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Thank you for the reply. I was betting that would be the answer. However I failed to mention this has been happening since new. And further, getting warmer water only really occurs in summer when...

I can't see any problem with it. I ran a similar set up many years ago but manually valved one out at a time as to not heat the cold boiler. Do you pump throught the cold boiler or bypass? My set...

I had a similar problem when pop ups got so bad I couldn't use the computer. I eventually had to reinstall everything. You might want to do it before you may not be able.
I too loaded...

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...

I'm not a pro but have been keeping a few boilers in our family running for 30 some years. I just joined this forum looking for several tips when I saw this problem. Maybe I missed it, but when you...