hydronic manifolds diy


Old 09-30-18, 05:53 PM
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hydronic manifolds diy

Hi all: Is there a reason not to build your own manifold for a in slab hydronic heat system for my shop build. There are many pretty manifolds for sale out there but they seem expensive for what they do. Can I solder up with standard copper tees and 90s with shutoff valves air relief and do the same thing for a 4 loop shop system. I won't have gpm flow meter for each loop but probably don't need that for one pump one circuit system. what do you think?
Old 10-01-18, 12:05 PM
Join Date: Apr 2014
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There is no magic in those manifolds, just use adequate pipe/tubing size.

Set up so each loop so it can be isolated for service. In the middle of winter you do not want to shut down entire system because there issue with one loop. Each should have isolation valves, drain and vent.

Make provision to easily remove pump for service or replacement with isolation valves. Would also lay out system so a future loop could be added.

The newer ECM pumps reduce electric costs and with automatic pressure and flow sensors, autoadapt feature make it much easier to set up system The Grundfos-Alpha is plug and play with 7 different configurations.


A flow meter is not necessary. To set up, monitor and balance zones use a $17 dual channel digital thermometer with features for history, min max, delta, etc. Loop delta T is typically 20F to 30F.



Last edited by doughess; 10-01-18 at 02:57 PM.

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