{"id":3573,"date":"2026-09-28T15:12:26","date_gmt":"2026-09-28T13:12:26","guid":{"rendered":"https:\/\/bluelight-gmbh.de\/faq\/"},"modified":"2026-10-07T14:36:37","modified_gmt":"2026-10-07T12:36:37","slug":"faq","status":"publish","type":"page","link":"https:\/\/bluelight-gmbh.de\/en\/faq\/","title":{"rendered":"FAQ"},"content":{"rendered":"\n<div class=\"wp-block-cover is-light row_xxl\" style=\"min-height:460px;aspect-ratio:unset;\"><video class=\"wp-block-cover__video-background intrinsic-ignore\" autoplay muted loop playsinline src=\"https:\/\/bluelight-gmbh.de\/wp-content\/uploads\/bluelight-animation.mp4\" data-object-fit=\"cover\"><\/video><span aria-hidden=\"true\" class=\"wp-block-cover__background has-color-13-background-color has-background-dim-20 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<h1 class=\"wp-block-heading has-color-62-color has-text-color has-large-font-size gs_RZtUx9\">FAQ<\/h1>\n<\/div><\/div>\n<div  class=\"gs_lTsq9Y row_wrap\">\n<div class=\"wp-block-columns are-vertically-aligned-center row_l is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center col-12 col-sm-auto is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h3 class=\"wp-block-heading\">Process &amp; Technology<\/h3>\n\n\n<div  class=\"spacer_wrap \" aria-hidden=\"true\"><div class=\"wp-block-spacer inner-sm\" style=\"height:calc(20px * 0.4)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-md\" style=\"height:calc(20px * 0.6)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-lg\" style=\"height:calc(20px * 0.8)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-xl\" style=\"height:20px\" aria-hidden=\"true\"><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion faq-acc gs_g8gVsN \" data-autoclose=\"false\" data-openfirst=\"true\">\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-py7r-1\" id=\"title-py7r-1\"><span>What is the Bluelight LED system?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-py7r-1\" aria-labelledby=\"title-py7r-1\" hidden>\n<p class=\"wp-block-paragraph\">A fully integrated system combining patented LED curing technology with approved light-curing pipe liners. It is used for the trenchless rehabilitation of wastewater pipes. <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-jq26-2\" id=\"title-jq26-2\"><span>How does LED curing of pipe liners work?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-jq26-2\" aria-labelledby=\"title-jq26-2\" hidden>\n<p class=\"wp-block-paragraph\">A liner impregnated with light-curing resin is inserted into the existing pipe and pressed against the pipe wall using air pressure. An LED light head is then pulled through the liner. The blue light activates the photoinitiators in the resin, curing the liner into a new, structurally sound pipe within the existing pipe.  <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-c4un-3\" id=\"title-c4un-3\"><span>Why blue light rather than UV light?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-c4un-3\" aria-labelledby=\"title-c4un-3\" hidden>\n<p class=\"wp-block-paragraph\">Bluelight operates in the blue-light wavelength range around 450 nm (444\u2013457 nm). The resin systems contain specially developed, patented photoinitiators. The LEDs are compact, lightweight and energy-efficient.  <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-aeon-4\" id=\"title-aeon-4\"><span>How quickly does a Bluelight liner cure?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-aeon-4\" aria-labelledby=\"title-aeon-4\" hidden>\n<p class=\"wp-block-paragraph\">At a rate of 0.30 to 1.65 metres per minute, equivalent to 18 to 99 metres per hour. The exact rate depends on the liner type, diameter, wall thickness and LED head. <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-j9rd-5\" id=\"title-j9rd-5\"><span>Which pipe diameters can be rehabilitated?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-j9rd-5\" aria-labelledby=\"title-j9rd-5\" hidden>\n<p class=\"wp-block-paragraph\">The PAA F-Liner covers DN70 to DN400. The PAA GF-Liner covers DN150 to DN600, as well as egg-shaped profiles from DN200\/300 to DN400\/600. <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-7fv1-6\" id=\"title-7fv1-6\"><span>What is the maximum length that can be rehabilitated in a single installation?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-7fv1-6\" aria-labelledby=\"title-7fv1-6\" hidden>\n<p class=\"wp-block-paragraph\">Up to 125 metres in a single installation, and more in exceptional cases. <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-9v6e-7\" id=\"title-9v6e-7\"><span>Can bends and changes in nominal diameter be rehabilitated?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-9v6e-7\" aria-labelledby=\"title-9v6e-7\" hidden>\n<p class=\"wp-block-paragraph\">Yes. The PAA F-Liner can negotiate bends of up to 90 degrees and accommodate 2D or 3D changes in nominal diameter, depending on the product. The PAA GF-Liner can negotiate bends of up to 15 degrees, but cannot accommodate changes in nominal diameter.  <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-athu-8\" id=\"title-athu-8\"><span>Is open-end rehabilitation possible?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-athu-8\" aria-labelledby=\"title-athu-8\" hidden>\n<p class=\"wp-block-paragraph\">Yes, with the PAA F-Liner. A special light-transmitting support tube is used for this purpose. <\/p>\n<\/div><\/div>\n<style class=\"greyd-styles\">.gs_g8gVsN .wp-block-greyd-accordion-item { --accord-title-font-size: 1.2em; --accord-text-color: var(--wp--preset--color--color-31); --accord-title-bg-color: var(--wp--preset--color--color-41); --accord-title-text-color: var(--wp--preset--color--color-62); --accord-content-padding: 0 30px 0px 10px; --accord-icon-font-size: 1.6em; --accord-align-items: flex-start; } <\/style><style class=\"greyd-styles\">. { --accord-title-font-size: 1.2em; --accord-text-color: var(--wp--preset--color--color-31); --accord-title-bg-color: var(--wp--preset--color--color-41); --accord-title-text-color: var(--wp--preset--color--color-62); --accord-content-padding: 0 30px 0px 10px; --accord-icon-font-size: 1.6em; --accord-align-items: flex-start; } <\/style><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><div  class=\"spacer_wrap \" aria-hidden=\"true\"><div class=\"wp-block-spacer inner-sm\" style=\"height:calc(40px * 0.4)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-md\" style=\"height:calc(40px * 0.6)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-lg\" style=\"height:calc(40px * 0.8)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-xl\" style=\"height:40px\" aria-hidden=\"true\"><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\">Materials<\/h3>\n\n\n<div  class=\"spacer_wrap \" aria-hidden=\"true\"><div class=\"wp-block-spacer inner-sm\" style=\"height:calc(20px * 0.4)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-md\" style=\"height:calc(20px * 0.6)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-lg\" style=\"height:calc(20px * 0.8)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-xl\" style=\"height:20px\" aria-hidden=\"true\"><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion faq-acc gs_BZqd9T \" data-autoclose=\"false\" data-openfirst=\"true\">\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-py7r-9\" id=\"title-py7r-9\"><span>What is the difference between the PAA F-Liner and the PAA GF-Liner?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-py7r-9\" aria-labelledby=\"title-py7r-9\" hidden>\n<p class=\"wp-block-paragraph\">The F-Liner has a flexible synthetic-fibre carrier with a PU coating and is installed using the inversion method. It is particularly suitable for lateral connections and underground drainage pipes with bends. The GF-Liner has a dimensionally stable glass-fibre carrier (GRP), is pulled into place and is designed for larger, straight pipe sections.  <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-jq26-10\" id=\"title-jq26-10\"><span>Are the resins styrene-free?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-jq26-10\" aria-labelledby=\"title-jq26-10\" hidden>\n<p class=\"wp-block-paragraph\">The F-Liner uses only styrene-free vinyl ester resin (AP450). For the GF-Liner, you can choose between styrene-free vinyl ester resin (AP450) and styrene-containing polyester resin (PB450). <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-c4un-11\" id=\"title-c4un-11\"><span>Can I impregnate liners on site myself, or purchase pre-impregnated liners?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-c4un-11\" aria-labelledby=\"title-c4un-11\" hidden>\n<p class=\"wp-block-paragraph\">Both options are available. Impregnated liners are storage-stable. Excess resin can be returned to its container during impregnation.  <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-aeon-12\" id=\"title-aeon-12\"><span>Which approvals does the Bluelight system hold?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-aeon-12\" aria-labelledby=\"title-aeon-12\" hidden>\n<p class=\"wp-block-paragraph\">The technology is approved by DIBt (Germany), WRC (United Kingdom) and CSTB (France). The approval documents can be downloaded from the <span class=\"is-button link\" data-type=\"link\" data-params=\"{\" url=\"\" materialien=\"\">Materials page<\/span>. <\/p>\n<\/div><\/div>\n<style class=\"greyd-styles\">.gs_BZqd9T .wp-block-greyd-accordion-item { --accord-title-font-size: 1.2em; --accord-text-color: var(--wp--preset--color--color-31); --accord-title-bg-color: var(--wp--preset--color--color-41); --accord-title-text-color: var(--wp--preset--color--color-62); --accord-content-padding: 0 30px 0px 10px; --accord-icon-font-size: 1.6em; --accord-align-items: flex-start; } <\/style><style class=\"greyd-styles\">. { --accord-title-font-size: 1.2em; --accord-text-color: var(--wp--preset--color--color-31); --accord-title-bg-color: var(--wp--preset--color--color-41); --accord-title-text-color: var(--wp--preset--color--color-62); --accord-content-padding: 0 30px 0px 10px; --accord-icon-font-size: 1.6em; --accord-align-items: flex-start; } <\/style><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><div  class=\"spacer_wrap \" aria-hidden=\"true\"><div class=\"wp-block-spacer inner-sm\" style=\"height:calc(40px * 0.4)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-md\" style=\"height:calc(40px * 0.6)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-lg\" style=\"height:calc(40px * 0.8)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-xl\" style=\"height:40px\" aria-hidden=\"true\"><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\">Benefits &amp; Sustainability<\/h3>\n\n\n<div  class=\"spacer_wrap \" aria-hidden=\"true\"><div class=\"wp-block-spacer inner-sm\" style=\"height:calc(20px * 0.4)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-md\" style=\"height:calc(20px * 0.6)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-lg\" style=\"height:calc(20px * 0.8)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-xl\" style=\"height:20px\" aria-hidden=\"true\"><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion faq-acc gs_by3qmK \" data-autoclose=\"false\" data-openfirst=\"true\">\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-py7r-13\" id=\"title-py7r-13\"><span>How long does a sewer rehabilitated with Bluelight last?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-py7r-13\" aria-labelledby=\"title-py7r-13\" hidden>\n<p class=\"wp-block-paragraph\">The service life is at least 50 years.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-jq26-14\" id=\"title-jq26-14\"><span>How environmentally friendly is LED curing?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-jq26-14\" aria-labelledby=\"title-jq26-14\" hidden>\n<p class=\"wp-block-paragraph\">The process is odour-free, produces low emissions and uses environmentally friendly resin. According to Bluelight, it reduces CO\u2082 emissions by 90 to 99% compared with heat-curing systems. Silicone support tubes can be reused.  <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-c4un-15\" id=\"title-c4un-15\"><span>What benefits does the system offer project owners and local residents?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-c4un-15\" aria-labelledby=\"title-c4un-15\" hidden>\n<p class=\"wp-block-paragraph\">Installation times are short, rehabilitated sections can be returned to service quickly, there are no chemical odours and no excavation is required. After rehabilitation, the pipe is watertight and structurally sound. <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-aeon-16\" id=\"title-aeon-16\"><span>How is the quality of the rehabilitation documented?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-aeon-16\" aria-labelledby=\"title-aeon-16\" hidden>\n<p class=\"wp-block-paragraph\">The system is fully software-controlled and automatically records all relevant parameters. The liner can be inspected by camera before curing. In addition, the group\u2019s own laboratories test raw materials and samples of liners cured on site.  <\/p>\n<\/div><\/div>\n<style class=\"greyd-styles\">.gs_by3qmK .wp-block-greyd-accordion-item { --accord-title-font-size: 1.2em; --accord-text-color: var(--wp--preset--color--color-31); --accord-title-bg-color: var(--wp--preset--color--color-41); --accord-title-text-color: var(--wp--preset--color--color-62); --accord-content-padding: 0 30px 0px 10px; --accord-icon-font-size: 1.6em; --accord-align-items: flex-start; } <\/style><style class=\"greyd-styles\">. { --accord-title-font-size: 1.2em; --accord-text-color: var(--wp--preset--color--color-31); --accord-title-bg-color: var(--wp--preset--color--color-41); --accord-title-text-color: var(--wp--preset--color--color-62); --accord-content-padding: 0 30px 0px 10px; --accord-icon-font-size: 1.6em; --accord-align-items: flex-start; } <\/style><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><div  class=\"spacer_wrap \" aria-hidden=\"true\"><div class=\"wp-block-spacer inner-sm\" style=\"height:calc(40px * 0.4)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-md\" style=\"height:calc(40px * 0.6)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-lg\" style=\"height:calc(40px * 0.8)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-xl\" style=\"height:40px\" aria-hidden=\"true\"><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\">Service &amp; Purchasing<\/h3>\n\n\n<div  class=\"spacer_wrap \" aria-hidden=\"true\"><div class=\"wp-block-spacer inner-sm\" style=\"height:calc(20px * 0.4)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-md\" style=\"height:calc(20px * 0.6)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-lg\" style=\"height:calc(20px * 0.8)\" aria-hidden=\"true\"><\/div><div class=\"wp-block-spacer inner-xl\" style=\"height:20px\" aria-hidden=\"true\"><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion faq-acc gs_BpiMyg \" data-autoclose=\"false\" data-openfirst=\"true\">\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-py7r-17\" id=\"title-py7r-17\"><span>Does Bluelight carry out rehabilitation work itself?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-py7r-17\" aria-labelledby=\"title-py7r-17\" hidden>\n<p class=\"wp-block-paragraph\">No. Bluelight is a trading company and does not enter into contracts to carry out rehabilitation work. Rehabilitation is performed by system users, who are specialist contractors. A list is available on the \u201cUsers\u201d page.   <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-jq26-18\" id=\"title-jq26-18\"><span>Can I test or rent the equipment before purchasing it?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-jq26-18\" aria-labelledby=\"title-jq26-18\" hidden>\n<p class=\"wp-block-paragraph\">Yes. Bluelight offers a demonstration and rental system with an application technician for individual projects, and also maintains a pool of rental equipment. <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-c4un-19\" id=\"title-c4un-19\"><span>Is training included in the purchase price?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-c4un-19\" aria-labelledby=\"title-c4un-19\" hidden>\n<p class=\"wp-block-paragraph\">Yes. The purchase includes one to two weeks of personalised training at the customer\u2019s premises. Regular user training, remote maintenance and workshops in Germany and Denmark are also available.  <\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-greyd-accordion-item\"><button class=\"wp-block-greyd-accordion__title\" role=\"button\" type=\"button\" aria-expanded=\"false\" aria-controls=\"sect-aeon-20\" id=\"title-aeon-20\"><span>What is DiametriX?<\/span><span class=\"icon icon-normal arrow_carrot-up\" aria-hidden=\"true\"><\/span><span class=\"icon icon-active arrow_carrot-down\" aria-hidden=\"true\"><\/span><\/button><div class=\"wp-block-greyd-accordion__content\" role=\"region\" id=\"sect-aeon-20\" aria-labelledby=\"title-aeon-20\" hidden>\n<p class=\"wp-block-paragraph\">A laser measuring device that determines the diameter, circumference and shape of a sewer from above, through the manhole, without anyone having to enter and without requiring a manhole attendant. It measures sizes from DN100 to DN1000 (up to DN1500 for concrete pipes), with a typical deviation of approximately \u00b12%, and can be operated via an app without training. <\/p>\n<\/div><\/div>\n<style class=\"greyd-styles\">.gs_BpiMyg .wp-block-greyd-accordion-item { --accord-title-font-size: 1.2em; --accord-text-color: var(--wp--preset--color--color-31); --accord-title-bg-color: var(--wp--preset--color--color-41); --accord-title-text-color: var(--wp--preset--color--color-62); --accord-content-padding: 0 30px 0px 10px; --accord-icon-font-size: 1.6em; --accord-align-items: flex-start; } <\/style><style class=\"greyd-styles\">. { --accord-title-font-size: 1.2em; --accord-text-color: var(--wp--preset--color--color-31); --accord-title-bg-color: var(--wp--preset--color--color-41); --accord-title-text-color: var(--wp--preset--color--color-62); --accord-content-padding: 0 30px 0px 10px; --accord-icon-font-size: 1.6em; --accord-align-items: flex-start; } <\/style><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Process &amp; Technology Materials Benefits &amp; Sustainability Service &amp; Purchasing<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"greyd_block_editor_preview":[],"footnotes":""},"class_list":["post-3573","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>FAQ - Bluelight<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bluelight-gmbh.de\/en\/faq\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"FAQ - Bluelight\" \/>\n<meta property=\"og:description\" content=\"Process &amp; Technology Materials Benefits &amp; Sustainability Service &amp; Purchasing\" \/>\n<meta property=\"og:url\" content=\"https:\/\/bluelight-gmbh.de\/en\/faq\/\" \/>\n<meta property=\"og:site_name\" content=\"Bluelight\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-07T12:36:37+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/bluelight-gmbh.de\\\/en\\\/faq\\\/\",\"url\":\"https:\\\/\\\/bluelight-gmbh.de\\\/en\\\/faq\\\/\",\"name\":\"FAQ - Bluelight\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/bluelight-gmbh.de\\\/en\\\/#website\"},\"datePublished\":\"2026-09-28T13:12:26+00:00\",\"dateModified\":\"2026-10-07T12:36:37+00:00\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/bluelight-gmbh.de\\\/en\\\/faq\\\/\"]}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/bluelight-gmbh.de\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/bluelight-gmbh.de\\\/en\\\/\",\"name\":\"Bluelight\",\"description\":\"Schlauchlinersysteme\",\"publisher\":{\"@id\":\"https:\\\/\\\/bluelight-gmbh.de\\\/en\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/bluelight-gmbh.de\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/bluelight-gmbh.de\\\/en\\\/#organization\",\"name\":\"Bluelight\",\"url\":\"https:\\\/\\\/bluelight-gmbh.de\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/bluelight-gmbh.de\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/bluelight-gmbh.de\\\/wp-content\\\/uploads\\\/2022\\\/04\\\/bluelight_logo.svg\",\"contentUrl\":\"https:\\\/\\\/bluelight-gmbh.de\\\/wp-content\\\/uploads\\\/2022\\\/04\\\/bluelight_logo.svg\",\"caption\":\"Bluelight\"},\"image\":{\"@id\":\"https:\\\/\\\/bluelight-gmbh.de\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"FAQ - Bluelight","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/bluelight-gmbh.de\/en\/faq\/","og_locale":"en_US","og_type":"article","og_title":"FAQ - Bluelight","og_description":"Process &amp; 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