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Thread: Watts 70a valve

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  1. #1
    DIY Junior Member
    Join Date
    Feb 2010

    Default Watts 70a valve

    Hi, new to the forum. Looking for some advice. Have a Watts 70a tempering valve on oil fired tankless boiler. This time of year the incoming city water gets cold enough that the tankless set up struggles to deliver warm water. Over the years I've wondered if there's something I can do to reduce the cold water blending into the hot. I am pretty sure the coil can handle the load but there's too much cold water mixing in. Actually, this valve has been on the cool side since it was new.

    A few years back I opened the 70a but don't recall if I can add a spacer or change a spring to cut down the flow of cold mixing water? Any tips on getting more heat out of this valve? Thank you all for reading...
    Last edited by wooson; 02-06-2010 at 10:05 AM.


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