Luminor RQ-290 Sleeve for LB4-031, LB5-031, LB6-031
Luminor RQ-290 Sleeve for LB4-031, LB5-031, LB6-031
Description
The RQ-290 is a genuine Luminor replacement quartz sleeve for LUMINOR BLACKCOMB LB4-031, LB5-031, and LB6-031 UV systems, plus their NSF Class A/B, LBV, total organic carbon (TOC), and 12V DC variants below. It's an authentic Luminor part, not an aftermarket substitute, so your system keeps performing the way it was tested and certified.
Fits these Luminor BLACKCOMB systems
- LB4-031
- LB5-031
- LB6-031
- LB5-031B (NSF Class B, non-monitored)
- LB6-031B (NSF Class B, non-monitored)
- LB6-031A (NSF Class A, monitored, includes UV sensor)
- LBV-031
- LB4-031-TOC (total organic carbon reduction)
- LB5-03-12V (12VDC power)
- LB6-03-12V (12VDC power)
- LB6-03A-12V (12VDC power, NSF Class A, monitored)
That's 11 model numbers, and every one of them uses the identical RQ-290.
Why the 12V models use the same sleeve
The LB5-03-12V, LB6-03-12V, and LB6-03A-12V variants swap the standard 110V power supply for a 12-volt DC configuration, built for off-grid, RV, marine, and other mobile water treatment setups. The UV chamber and quartz sleeve are unchanged from the standard line, so all three 12V variants use the identical RQ-290.
The RQ-290 also fits the LB4-031-TOC system
The LB4-031-TOC total organic carbon reduction system shares the same chamber and sleeve as the standard LB4-031, even though it runs a separate dual-wavelength RL-290-TOC lamp rather than the standard RL-290.
Why a genuine Luminor sleeve matters
Luminor certifies its UV systems as a complete lamp, chamber, and sleeve unit. A non-Luminor sleeve can differ in wall thickness or quartz quality, reducing UV-C output reaching the water and affecting your warranty coverage.
Complete your replacement
- Luminor RL-290 UV Replacement Lamp, the lamp that goes inside this sleeve for the standard 110V and 12VDC systems. Replace every 12 months, or after 9,000 hours. The LB4-031-TOC uses a separate RL-290-TOC lamp instead.
- Luminor RLQ-290 UV Lamp and Sleeve Kit, which bundles the RL-290 lamp, RQ-290 sleeve, and lamp key together for LB4-031, LB5-031, and LB6-031.
- Replace every 24 months or as needed
- Length: 13.22" (336mm)
- Style: Domed
Helpful Info & Downloads
Q:
Does the RQ-290 fit the 12V DC systems, like the LB5-03-12V?
A:
Yes. The LB5-03-12V, LB6-03-12V, and LB6-03A-12V variants only change the power supply, for off-grid, RV, and marine installations. The chamber and sleeve are identical to the standard 110V LB4/5/6-031 line, so they all use the same RQ-290.
Q:
Does the RQ-290 fit the LB4-031-TOC system?
A:
Yes. The TOC system uses the same chamber and sleeve as the standard LB4-031; only the lamp is different, since the TOC variant requires the dual-wavelength RL-290-TOC instead of the standard RL-290.
Q:
How do I know if I need to clean the sleeve or replace it?
A:
Clean it if it's scaled or lightly stained; replace it if it's scratched, pitted, or stays cloudy after cleaning. Even with no visible damage, Luminor recommends replacing the sleeve every 24 months as routine maintenance, since UV-C transmission through quartz declines gradually with age.
Q:
Do I need to buy the lamp too, or can I just replace the sleeve?
A:
The RQ-290 is the sleeve only. If your lamp is also due, pair it with the [RL-290](https://espwaterproducts.com/products/luminor-rl-290-uv-replacement-lamp) lamp, or save by ordering the [RLQ-290](https://espwaterproducts.com/products/luminor-rlq-290-uv-lamp-and-sleeve-kit-for-lb4-031-lb5-031-lb6-031) kit, which bundles both. TOC systems need the separate RL-290-TOC lamp rather than the standard RL-290.
Q:
Can I use a non-Luminor sleeve instead of the RQ-290?
A:
You can, but it's not recommended. Luminor certifies its systems as a complete lamp-chamber-sleeve unit, and a non-Luminor sleeve can differ in wall thickness or quartz quality, which reduces the UV-C dose reaching the water and can affect your warranty coverage.
