What it delivers
The CRESTWAVE RS 15-9 Hot Water Recirculation Pump is a hot water recirculation pump.
It cuts the wait at distant fixtures by keeping hot water moving in the line; tankless heaters have a minimum flow, so follow the heater maker's recirculation instructions.
Pumps come as under-sink kits with a crossover valve or as line pumps near the heater; check which setup your heater's manual allows.
Other listed details: material: Cast Iron, PP; model: RS 15-9.
The listing gives npt 3/4" w/ npt 1/2" adapter, recirculating water pump in the box.
Right unit for this house?
Install it when
- Long waits for hot water
- Owners who flush their own heater
Look at another unit when
- Heaters whose manual calls for a different method
Strengths and trade-offs
Strengths
- Recirculation pump
Trade-offs
- Fit depends on your valves
Install limits
- Figures are the maker's or seller's own. Flow at a rise is our estimate from the input; gas, venting and electrical work needs a licensed professional.
Rated performance
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Model number | RS 15-9 | Retailer |
|---|---|---|
| Material | Cast Iron, PP | Retailer |
Rival units at this flow
More descaling and maintenance kits rated for similar demand
Final verdict
A sensible recirculation pump for long waits for hot water.
Buy this unit
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