Pentair Compression Nut Only | Rainbow Automatic Feeder Model 300 Series | R18706Z
- In stock, ready to ship
- Backordered: contact us for ETA
- SKU:
- R18706Z
-
Poolaroo Promise
- Fast Shipping — Ships in 1–2 Business Days
- 30-Day Risk-Free Returns — We Pay Return Shipping, No Restocking Fees
- Powered By People Who Care - No Faceless Conglomerate
About This Item
The Pentair Compression Nut Only (R18706Z) is the OEM replacement compression fitting nut for the Rainbow Automatic Feeder Model 300 series, including Models 300, 302, 300-19, and 300-29.
What It Does
This compression nut secures tubing connections on the Rainbow Automatic Feeder, maintaining a leak-free seal at the feeder's inlet and outlet tubing ports. A cracked, stripped, or missing compression nut allows chemical solution to bypass the fitting, resulting in uncontrolled dosing and potential equipment damage. Replacing this nut restores a positive, watertight connection at the tubing junction.
Specifications
| Pentair Part Number | R18706Z |
| Part Name | Compression Nut Only |
| Quantity Included | Each (1) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair (formerly Rainbow) | Automatic Feeder — Model 300 Series | 300 | — |
| Pentair (formerly Rainbow) | Spa / Hot Tub Feeder — Model 300 Series | 302 | — |
| Pentair (formerly Rainbow) | Automatic Feeder — Model 300 Series | 300-19 | — |
| Pentair (formerly Rainbow) | Automatic Feeder — Model 300 Series | 300-29 | — |
Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.
Pro Tip
Compression nuts on chemical feeders are exposed to concentrated sanitizer solutions and can become brittle or cross-threaded over time. When replacing this nut, inspect the corresponding compression ferrule and tubing end for cracking or chemical degradation — replacing the nut alone on damaged tubing will not produce a reliable seal. Hand-tighten first to confirm thread engagement, then snug with a wrench — overtightening will crack the nut.
