Review on 🔧 Mueller 107 823NL Full Port Valve: Superior Control and Reliability for Your Plumbing Needs by Paul Gravely

Finally I did it, I learned how to solder on YouTube. I installed this in-line check valve next to a horizontal check valve and between two fittings. All threaded for easy disassembly. Three leaks were later repaired with pipe thread additive wrapped in Teflon tape and mostly tightened. The heat traps didn't work, took them out and used the check valves. Laing Ecocirc D5 threaded solar pump used, part no. D5 SOLAR/710B HVACQuick.com is the cheapest and also close to the connection for easy replacement. Insulated piping and shrouds around a new 80 gallon Smith Sun 80 heater from Supplyhouse.com. which 240# is empty. Great job, was fun but done.