What it delivers
The Watts LF-TWH-HCN-RV 3/4 Tankless Isolation Valve Kit is a pair of tankless service valves for flushing and isolating the heater.
With isolation valves on both lines, descaling is a hose-on, hose-off job; the hot-side valve usually carries the relief valve port.
Before ordering, check the heater's fitting size and whether you want threaded, sweat or push-fit connections; the hot-side valve usually takes the pressure relief valve.
Other listed details: connections: 3/4 inches; material: Lead Free Copper Silicon Alloy; model: LF-TWH-HCN-RV 3/4.
The listing gives dimensions of 13 x 7.5 x 3.4 inches.
Right unit for this house?
Install it when
- New tankless installs
- Owners who flush their own heater
Look at another unit when
- Heaters whose manual calls for a different method
Strengths and trade-offs
Strengths
- Isolation valve kit
Trade-offs
- Match it to your heater's fittings
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 | LF-TWH-HCN-RV 3/4 | Retailer |
|---|---|---|
| Material | Lead Free Copper Silicon Alloy | Retailer |
| Dimensions (seller) | 13 x 7.5 x 3.4 inches | Retailer |
| Connections | 3/4 inches | Retailer |
| Replaces | up to 18 fittings and 16 connections used | Retailer |
Rival units at this flow
More descaling and maintenance kits rated for similar demand
Final verdict
A sensible isolation valve kit for new tankless installs.
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