
Quick overview
- Genuine Pentair part R270531 is the factory union for the Rainbow HC series feeder.
- 1" threaded Sized and threaded to match the HC series feeder ports.
- Union connection Lets the feeder be disconnected for service without cutting the plumbing.
- HC series feeders Listed for the Rainbow automatic feeder models HC-3315, HC-3330 and 3340.
- Common service item Union nuts and their seals are what usually leak on a feeder that has been opened many times.
- Order by part number R270531 avoids a near miss on thread type or size.
Similar products
Other products people compare with this one.
Product details
The Pentair R270531 is the 1" threaded union used on Rainbow HC series automatic chemical feeders, including the HC-3315, HC-3330 and 3340. It is the genuine Pentair part.
What the union is for
A feeder has to come out of the line from time to time, for service, for a rebuild, or to be replaced outright. A union is the fitting that makes that possible without a saw: undo the nut, lift the feeder out, and put it back on the same threads afterwards.
When to replace one
Unions are opened and closed more than any other fitting on a feeder, and each cycle wears the nut threads and the seal face. If the joint weeps after tightening, or the nut no longer pulls up cleanly, replacing the union is faster and more reliable than trying to seal a worn one. Check that your feeder is an HC series model before ordering, since feeder threads are not shared across families.
| Brand | Pentair |
|---|---|
| Manufacturer part number | R270531 |
| UPC | 788379702151 |
| Type | Threaded union |
| Size | 1" |
| Connection | Threaded |
| Fits | Pentair Rainbow automatic feeders, models HC-3315, HC-3330, 3340 |
| Shipping weight | 0.2 lb |
| Ships | Parcel |
Request a quote
Need a volume price, a freight quote, or pricing in writing before you order? We reply the same business day.
Customer reviews
More from Pentair
Questions and answers
What people ask about this product, answered by our pool techs.





















