Recent content by poriordan

To close this thread out, I bought an NDS part from our local irrigation supply wholesaler. With plenty of PTFE tape, it seals perfectly with the existing 3/4" fittings. After 3 attempts, I've gotten the check valve to the point where the pump can still recirculate water but the Rinnai no...

I came across this article that seemed to imply that they could not be connected without leaking: https://diy.stackexchange.com/questions/11582/is-ips-threading-compatible-with-npt-threading/11590 They are close, and both have 14 TPI. Can they be mated without leaking given the slight...

Thanks Wayne. Apparently the site you've found is spearsmfg.com. I will call them tomorrow to see if I can buy the part. I also found an adjustable part (also plastic) at https://www.ndspro.com/PDFs/Tech-Spec-Sheets/Adjustable-In-line-Spring-Check-Valve-CV,-UCV,-WCVxx.pdf but it's IPS and I...

Back at it ;-) To answer Wayne's question, I do not believe there's a pressure reducing valve on our water supply. I called and spoke with Tech Support at Taco. Mario told me that the Taco unit's internal valve's cracking pressure is 18" of water (or about 0.6 PSI) and that's it's not...

Thank you both for your suggestions. I've been banned from any further work on this until after Thanksgiving ;-) I will report back next week

Wayne - you fixed it! I isolated the Taco unit and serviced the Chili Pepper as you suggested. There was no dirt inside the spring-loaded check valve so I just tightened it a turn. With the Taco unit isolated and the Chili Pepper "enabled", I can turn on water anywhere and not have the Rinnai...

Thanks so much for both posts, Wayne. To answers the question in your first post, the unwanted triggering occurs when any cold tap or toilet is used; not just the ones where the recirc pumps are located. And yes, we have isolation valves on both the cold and hot sides of each recirc pump...

Yes, the Taco (and the Chili Pepper) only run when a button is pushed. That turns on the pump that drives the water from the hot line down the cold line. The pump shuts off when the Taco senses the temperature of the water in the hot pipe getting warn.

We have just installed a Rinnai RU 199IN tankless water heater. This is replacing an Eternal unit we had for several years. We are using exactly the same plumbing but are experiencing a problem with the Rinnai that we never had with the Eternal. Whenever we turn on any cold tap, the Rinnai unit...