
Quick overview
- Genuine Waterway Factory o-ring, part number 805-0145.
- Sized for the 2 inch tail piece The seal that sits between the 2 inch tail piece and the union nut.
- Inside diameter 2-5/8 inches Measure the old ring against this before ordering, since union o-rings across sizes look alike.
- Outside diameter 2-13/16 inches The outer dimension that seats into the union face.
- A cheap fix for a wet union Most weeping unions are a flattened or nicked o-ring, not a failed nut or fitting.
- Worth replacing on sight Any time a union is broken loose for pump or filter service, the o-ring is the part to renew while it is apart.
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Product details
The Waterway 805-0145 is the o-ring for the 2 inch tail piece. It measures 2-5/8 inches inside diameter and 2-13/16 inches outside diameter.
Where it sits
The tail piece is the fitting that the union nut pulls up against, and this o-ring is the seal at that face. It is a small part carrying the entire joint. When it flattens with age, takes a nick from grit, or gets pinched during reassembly, the union weeps and no amount of extra torque on the nut stops it.
Check the size
Union o-rings in adjacent sizes look almost identical in the hand. Measure the old one across the inside and the outside and compare it against 2-5/8 inches and 2-13/16 inches before ordering. If a union is being opened anyway for pump or filter work, renewing the o-ring while it is apart is cheap insurance.
| Brand | Waterway |
|---|---|
| Manufacturer part number | 805-0145 |
| UPC | 806105129505 |
| Type | O-ring |
| Application | 2" tail piece |
| Inside diameter | 2-5/8" |
| Outside diameter | 2-13/16" |
| Shipping weight | 0.05 lb |
| Ships | Parcel |
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