What it delivers
The KolerFlo RS15-6 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.
Use a timer or on-demand control so the heater isn't firing to keep the loop hot all day, and insulate the hot line to the far fixture.
Listed details: material: Iron; model: RS15-6.
The listing gives dimensions of 5.12 in (L) x 5.12 in (W) x 4.92 in (H) and a weight of 5.2 lb.
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
- Check the connection size first
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 | RS15-6 | Retailer |
|---|---|---|
| Material | Iron | Retailer |
| Dimensions (seller) | 5.12"L x 5.12"W x 4.92"H | Retailer |
| Product weight | 5.2 lb | Retailer |
| Voltage | 110 V | Retailer |
Rival units at this flow
More descaling and maintenance kits rated for similar demand
Final verdict
A well-specified recirculation pump for long waits for hot water.
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