This is a genuine Davey spare part \u2014 a pack of two replacement O-rings for the barrel union connections on the Crystal Clear ER 135 and ER 180 cartridge filters. These O-rings create a watertight seal at the plumbing union fittings, preventing leaks between the filter and the pipework. They should be replaced whenever a leak is detected at a union joint, or as part of routine filter maintenance.<\/p>\n
Designed specifically for the Davey Crystal Clear ER 135 (model DCC135EU) and Crystal Clear ER 180 (model DCC180EU) cartridge filter series. If you own a different Crystal Clear model (e.g. ER 225 or ER 270), please verify the part number before ordering.<\/p>\n
Genuine Davey O-rings are engineered to the exact tolerances of the union fittings on ER Series filters, ensuring a reliable, pressure-rated seal. The barrel unions on these filters are hand-tightened with no sealants or adhesives, meaning the O-ring alone carries the full sealing duty \u2014 quality and fit are critical to leak-free operation up to the filter’s 250 kPa maximum operating pressure.<\/p>\n
Before fitting, inspect the union seat for debris or scoring. Clean the O-ring groove and apply a silicone-based lubricant (such as Hydroslip) to the new O-ring \u2014 never use petroleum-based products such as Vaseline, as these cause rubber to swell and deteriorate. Hand-tighten the union only; no tools, glues, or thread sealants are needed or recommended.<\/p>","protected":false},"excerpt":{"rendered":"