Wrekin Water carry a range of O-rings for a range of housings. Including our own Wrekin Brand but also, LIFF  and BWT NP1 & NDL2, Pentair, Slimline, Standard and Big Blue and others. Where possible we show a picture of the housing to help.

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Frequently asked questions

O-rings are matched to specific housing models (e.g. Slimline, HD10, SLH10, HF10BB) — check your housing model before ordering, since a mismatched O-ring won't seal properly.

Whenever you notice leaking at the housing seam, or as routine maintenance at each filter change — O-rings perish and lose their seal over time, especially with repeated opening and closing.

EPDM, which is the standard material for water filtration housing seals due to its durability and compatibility with potable water — check the specific listing to confirm for your exact model.

If your housing uses a twin O-ring design, yes, replace both together for a reliable seal — check the specific listing, since some housings (like our single O-ring Slimline variant) only use one.

Yes — a light smear of silicone grease (not petroleum-based) on the O-ring makes fitting easier and helps the seal, and is common practice when changing filter cartridges.