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piping a tankless

a t&p is not required on a tankless. A Watts 3L is all that you should need. A 53L could also be used but is not as well accepted because it is not 3/4". kpc


  • clammy
    clammy Member Posts: 3,092
    piping a tankless

    going back into the pit and i have a question on piping tankless heater i know to drop down 10 to 12 inches to give you a thermal cooling leg to save your mixing ,inlet and outlet valves and tees for future descaling but as for a pressue safety i know indirects and hot water heaters but i've never seen one on a tankless i've done many without what are your guys views and are you using a common t &p like a XL100 the reason i ask is i was some old lit.by a boiler manafactor and saw the saftey on a tankless pipe diagram and ps i do once in a while put coil limiters on the cold water inlet and by making that thermal leg you mixing valve element doesn't get destroyed and gives you better temp control in most of the valves instruction they show it in the diagrams thanks for any advise
    R.A. Calmbacher L.L.C. HVAC
    NJ Master HVAC Lic.
    Mahwah, NJ
    Specializing in steam and hydronic heating
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