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Re: Glycol Additives for new Ground Loop commissioning

Make sure that ground lop is pressure tested and certified leak gith — I'd want it to hold at least twice the relief valve pressure for at least 24 hurs.

Why? Because if you get that glycol into the ground in your area, you are going to have a big cleanup for really big dollars.

Jamie Hall

thermostatic mixing valve TMV not working with new tankless combi boiler.

I have recently installed a new Navien tankless boiler, which is working fine.

I have in a back bathroom a TMV mixing valve which does not appear to work with the new boiler. I have just replaced the valve to no avail. It makes no difference how I adjust the valve, max, min, or anywhere in between, I get no hot water, AND the tankless shows no DHW flow thru the status screens. (only this faucet, which is after the mixing valve, behaves in this way). The cold and hot lines are not reversed.

It appears to be a flow issue thru the valve ???

Thank you for any thoughts you might have.

geofear

Re: Question about Erie zone valve

This is why we, as techs, will replace the whole valve. It's not worth the risk to just change out parts of the valve and hope there isn't something else going on. If i was going to open up the valve and drain the system the smart play would have been to just change the whole valve body and actuator. Now your just questioning the issue again.

pedmec

Re: Riello Burner Issue

I had a Reillo oil burner in my previous house that started operating very intermittently . I would have to use the reset button to get it started again. Very hard to fix an intermittent problem, The service tech came and in the end the oil valve solenoid was the problem. He never saw this problem before. I may sound crazy but if I wanted to be independent of any service tech costs, I would just buy a second burner as a backup or source of spare parts to use for troubleshooting. Tradeoff between the cost of a service call and a replacement part versus buying a second burner to have on hand and doing your own work.

BrooklynMike

Re: Water loss in steam system

https://forum.heatinghelp.com/discussion/comment/1890755#Comment_1890755

Since this was installed for a previous homeowner, I would steer away from this kind of letter that could be perceived as a bit threatening. The copper looks like the connection from header to steam main from other thread and may be EXACTLY what the previous homeowner wanted to pay for during installation. The repair is relatively quick. Cut out bad joint and install new. Would it be better to repipe in black pipe? Of course, but when there is a budget...you get it functional if you cant repipe yourself. The boiler installation looks reasonably well done in pics from the other thread. Its a lot better near boiler piping than is often posted on this site.

4GenPlumber

Re: Heat flow HF 40 vs Pure Pro 40ss

People tend to overestimate the efficiency of an indirect. In the best case, they run about the same efficiency as a decent power vented stand alone gas water heater but cost about 2x to install. Around me the combination of boiler and power vent is the most common.

If you want cheap hot water and don't have a big tub to fill, heat pump water heaters are the cheapest to run and tend to be the least expensive to install especially in places with utility incentives. There are now versions that can be connected to a 120V circuit as well.