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Model # 70A-RK

Internet # 202564444

Store SKU # 258234

1/2 in. Hot Water Tempering Valve Repair Kit

This item has been discontinued.
The Home Depot no longer carries this specific product.



Model # 70A-RK

Internet # 202564444

Store SKU # 258234

Series 70A Hot Water Extender Tempering Valves are used in residential water supply applications to mix cold and hot water to extend capacity of water heater storage tanks and hot water boiler tankless heaters. The 70A repair kit will replace all serviceable parts for the 1/2 and 3/4" 70A Hot Water Extender Tempering Valves. The kits include the o-ring, spring, and thermostat. It is recommended that all parts are changed out at the same time and to only use genuine Watts original equipment parts to ensure compatibility.

  • The 70A repair kit will replace all serviceable parts for the 1/2 and 3/4 in. 70A hot water extender tempering valves
  • Kit includes the o-ring, spring, and thermostat
  • It is recommended that all parts are changed out at the same time
  • Use genuine Watts original equipment to ensure compatibility

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Maintenance, Repair & Supplies Product Type 
Miscellaneous Repair Kit 
Warranty / Certifications
Manufacturer Warranty 
Watts (the "Company") warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment. 


Rated 4.5 out of 5 by 2 reviewers.
Rated 4.0 out of 5.0 by Works as described, but I need more Hi this kit allowed me to repair it's function without my needing to cut & solder copper tubing, as it is designed. It's for a tankless hot water heater in a heating boiler. It mixes hot & cold water so that the domestic water is not scalding at the beginning and cold at the end before the burner comes on, or when the well pump cycles. The part functions as it should to mitigate the changes well enough, but ideally I should get a separate hot water (storage) tank heater, whether electric or oil I'm not sure yet. In the middle road I might put a thermostatic valve at the shower head so this process happens twice, like once (this part) for roughing in the temp, and the second (at the shower) to "fine tune" it, or a least make it a bit better. March 18, 2014
Rated 5.0 out of 5.0 by Arrived on time, works! The part arrived on time and worked perfectly, Easy to install. May 7, 2013
  • 2015-06-02T11:41:57.038-05:00
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Store Exclusive. This item is available for purchase in select stores only.