What it delivers
The Superior Pump 91660 Tankless Descaling Solution is a descaling solution for tankless water heaters.
It's the liquid side of a flush: mix it as the label says and circulate it through the heater with a flush pump.
Check your heater's manual before using a chemical descaler: Rinnai's consumer guide calls for undiluted white vinegar and warns against chemical solutions in its heaters.
Other listed details: connections: 1-inch NPT; material: Stainless Steel; model: 91660; solution: non-toxic.
Right unit for this house?
Install it when
- Flushing a scaled heat exchanger
- Owners who flush their own heater
Look at another unit when
- Heaters whose manual calls for a different method
Strengths and trade-offs
Strengths
- Descaling solution
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 | 91660 | Retailer |
|---|---|---|
| Material | Stainless Steel | Retailer |
| Connections | 1-inch NPT | Retailer |
| Solution | non-toxic | Retailer |
Rival units at this flow
More descaling and maintenance kits rated for similar demand
Final verdict
A sensible descaling solution for flushing a scaled heat exchanger.
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