Search results

  1. Lifespeed

    Diagnosing problems with NPE 240A recirculation

    The check valve "Grasping", are you serious? Bleeding air is the most basic of concepts. Closed hydraulic systems need bleeding, for obvious reasons. An open system (faucet) in many cases does not need to be bled, only needs it if there is a way to trap air in an elevated location where it...
  2. Lifespeed

    Diagnosing problems with NPE 240A recirculation

    Open the hot faucet, air is lighter than water. Water flow blows it out. There's your bleeder. You've never seen this? Needing a bleeder means the plumbing was done in a way that traps air. It's usually avoidable, but not always.
  3. Lifespeed

    Diagnosing problems with NPE 240A recirculation

    It's also pretty basic to place the pump near the high point in the system so it self-bleeds. Problem solved. Can't happen in every case, but is completely practical for many.
  4. Lifespeed

    What to replace my Noritz NRC111-DVNG with? It has a very noisy vent fan.

    Sound is conducted as well, depending on the structure it is mounted to it can act like a drum, resonating with normal water heater sounds. Bolted to studs with stucco on the outside is likely worsening the issue. There is a lot on the internet about soundproofing walls, search "green glue" to...
  5. Lifespeed

    Diagnosing problems with NPE 240A recirculation

    Hmmm, maybe Navien doesn't use a self-priming pump and this is specific to Navien? Specifics matter, if you say they need bleeding I believe you. With the O-ring failures and bleeding requirement, it would appear they could have done better. Taco pump doesn't need bleeding. No doubt it's 50X...
  6. Lifespeed

    Diagnosing problems with NPE 240A recirculation

    Isn't the recirc line subject to water pressure on the inlet side, and as such not require bleeding? I'll defer to the experts, but my external recirc has been drained several times when plumbing service was required elsewhere in the house. It spits some air out the hot water side of the...
  7. Lifespeed

    Diagnosing problems with NPE 240A recirculation

    Sure am glad I didn't get the recirc model, Navien appears to have cheaped out on some important internal parts. My external recirc is on 12 years without failure. Cheap to replace or not, the PITA factor of tearing into the water heater is so not worth it.
  8. Lifespeed

    Replacing Noritz NRC1111-DVNG 11GPM with Commercial Noritz or Navien

    My S2 is aware there is external circulation through a configuration menu, as well as type of circulator: always-on, intelligent, etc. This allows it to survive in a hostile recirculator environment, although it's preferred to set up external recirc correctly with an aquastat. I think they...
  9. Lifespeed

    Replacing Noritz NRC1111-DVNG 11GPM with Commercial Noritz or Navien

    You can't see the stainless pump body in the photo? The venting is a quick install to get hot showers while I wait for the roofer to come out and replace the roof jack to fit the PVC concentric vent. What a bunch of critics :rolleyes:
  10. Lifespeed

    Replacing Noritz NRC1111-DVNG 11GPM with Commercial Noritz or Navien

    I see I didn't post photos of my finished Navien NPE-240S2 installation, her are some belated pics. Old Noritz NRC1111-DVNG: And here is the new Navien S2 with dedicated external recirc controlled by home automation. Note the 12-year-old Taco pump and bronze, external check valve are still...
  11. Lifespeed

    Replacing Noritz NRC1111-DVNG 11GPM with Commercial Noritz or Navien

    Bought a Navien NPE-240S2. Mounting and venting now, plumber will come tomorrow to sweat the copper and move the gas pipe an inch or two.
  12. Lifespeed

    Replacing Noritz NRC1111-DVNG 11GPM with Commercial Noritz or Navien

    You're making assumptions about my recirculation setup. It is controlled by home automation and an aquastat. It works perfectly, only running when needed.
  13. Lifespeed

    Replacing Noritz NRC1111-DVNG 11GPM with Commercial Noritz or Navien

    Unfortunate about support not talking to homeowners, Noritz was good about that. I have a recirculation pump and check valve installed external to the water heater, so would want the NPE-240S2 model without recirc.
  14. Lifespeed

    Replacing Noritz NRC1111-DVNG 11GPM with Commercial Noritz or Navien

    The heater only saw softened water with the chloramine removed by a backwashing catalytic carbon filter, and was flushed with vinegar every year. It wasn't negligent maintenance, it was a Noritz problem.
  15. Lifespeed

    Replacing Noritz NRC1111-DVNG 11GPM with Commercial Noritz or Navien

    I have a Noritz NRC1111-DVNG installed in the attic when I re-piped the house in 2012. 10 months ago the lower copper heat exchanger started leaking, so I hired a local tankless specialist to replace it along with the gas manifold and some associated parts provided under warranty by Noritz...
  16. Lifespeed

    Replacing obsolete Laing UCT 909 Recirc pump

    https://readytemp.com/
  17. Lifespeed

    Pressure regulator drop under modest flow

    Improving the water hammer issue allowed me to up the pressure a few psi, which seems to be enough that I don't hate it so much. 500XL ain't no $80 dollar pressure regulator, either.
  18. Lifespeed

    Pressure regulator drop under modest flow

    Again, there was no guessing involved on my end. I measured the pressure into the regulator static and under flow, posted above. The pressure drop under flow is solely caused by the regulator, and Zurn cops to this when they state "12-17psi of fall off is normal", as well as when they describe...
  19. Lifespeed

    Pressure regulator drop under modest flow

    Arrester opposed to the valve: Arrester opposed to the long pipe:
  20. Lifespeed

    Pressure regulator drop under modest flow

    The plumbing system is properly secured. The water hammer from one hose bib irrigation valve was still extreme after securing the pipes with the cause remaining elusive. It turns out the 25' long straight run of 3/4" copper formed a resonant column, amplifying the shock wave. Re-orienting the...
Top
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks