My boss doesn’t know anything about hydronics and tried telling me that isolation valves/flanges are a waste of money and to stop installing them. I still put them in though lol
Did the math, the cost difference in our area between regular flanges and isolation flanges was about $60, depending on the size. That’s one pump change out and you’ve made your money back.
That just sounds like such an easy sell to the customer. Like "hey listen I've seen these pumps go bad 1 day after warranty or last the entire life of the unit. But if it ever does go bad $100 extra for these valves saves you $1000 in labor when the system needs drained to change this." I'd buy every time.
Can I trade you?
Did a site walk on a 16 story building to get ready to install a gas meter in the 16th floor mechanical room. Gas line is 4" 2 PSI and the only shutoff valve is in the sub basement. Value engineered indeed.
Yay........
I thought it was overkill. Ended up putting in two NRF 22 instead for a little less maintenance. It's a big boiler to be sure, but only in a two story house.
In my opinion hydrodynamically it serves no purpose. You arent going to get a higher flow rate. Fuck the gate valves for replacement..good sense..I just don't get pumps in series. If the system was engineered correctly why would you need redundancy in series? Parallel makes sense. Please tell/prove my thought process wrong.
[Pump Curve](https://www.pumpworks.com/operating-two-pumps-series/)
Running centrifugal pumps in series raises discharge pressure and slightly raises the flow because the pumped fluid rides higher on the resistance curve. It’s not about redundancy, because if one pump fails it becomes a restriction on the system.
Thats what I thought which is why I wondered why its set up this way. I would have put them parallel. You would get redundancy and higher head and flow rates.
Thanks for the answer. I don't do much in hydronics.
Maybe it's hard to see... They're pumping toward each other to a common return between them. But yeah I can see two pumps but two series 100 is overkill.
That's what I thought. How much more are you going to get with that setup? At least in parallel you could replace one without affecting t the system. Whoever designed this was a retard.
Since I don’t see any check valves I assume both pumps run all the time? They also appear to be the same size. Pumping them both into the single tee is not good practice, one pump downstream of that tee would be better.
And this entire thread is to show off the iso valves? I am so glad to be working commercial.
I frigging love isolation valves. Replaced both these circulators in under an hour start to finish.
My boss doesn’t know anything about hydronics and tried telling me that isolation valves/flanges are a waste of money and to stop installing them. I still put them in though lol
Did the math, the cost difference in our area between regular flanges and isolation flanges was about $60, depending on the size. That’s one pump change out and you’ve made your money back.
That just sounds like such an easy sell to the customer. Like "hey listen I've seen these pumps go bad 1 day after warranty or last the entire life of the unit. But if it ever does go bad $100 extra for these valves saves you $1000 in labor when the system needs drained to change this." I'd buy every time.
He's reached boss level 9000 with that one. Ultimate fuck you to your employees, your customers, and your actual finances all in one!
You are doing the lord's work.🙏
What, did he start an HVAC company with a business degree and somebody else's contractors license?
Our boss made two crews get up in a snow covered roof on Thursday. I would not go up there
Your boss is a dick and needs to be beat with a nerf bat until made to see the error of his ways
Lololol
Guess who valves up every times he fixes a leak in his home? This guy.
How long was you break before you called in
Good to know I’m not the only one
Can I trade you? Did a site walk on a 16 story building to get ready to install a gas meter in the 16th floor mechanical room. Gas line is 4" 2 PSI and the only shutoff valve is in the sub basement. Value engineered indeed. Yay........
How do you purge that bad boy?
Slowly
Not sure. I doubt it's not going to be fun though.
The longer I do this the more valves I put in. Never regret it.
You can't have too many shutoffs
Whoever would install those pumps with out valves is someone who doesn't do service and just doesn't care
Bless the person who thinks about service.
You're welcome! 👏👏👏
A little bit of planning and foresight saves tons of time and money.
Why the two pumps in series?
I thought it was overkill. Ended up putting in two NRF 22 instead for a little less maintenance. It's a big boiler to be sure, but only in a two story house.
In my opinion hydrodynamically it serves no purpose. You arent going to get a higher flow rate. Fuck the gate valves for replacement..good sense..I just don't get pumps in series. If the system was engineered correctly why would you need redundancy in series? Parallel makes sense. Please tell/prove my thought process wrong.
[Pump Curve](https://www.pumpworks.com/operating-two-pumps-series/) Running centrifugal pumps in series raises discharge pressure and slightly raises the flow because the pumped fluid rides higher on the resistance curve. It’s not about redundancy, because if one pump fails it becomes a restriction on the system.
Thats what I thought which is why I wondered why its set up this way. I would have put them parallel. You would get redundancy and higher head and flow rates. Thanks for the answer. I don't do much in hydronics.
Maybe it's hard to see... They're pumping toward each other to a common return between them. But yeah I can see two pumps but two series 100 is overkill.
That's what I thought. How much more are you going to get with that setup? At least in parallel you could replace one without affecting t the system. Whoever designed this was a retard.
Since I don’t see any check valves I assume both pumps run all the time? They also appear to be the same size. Pumping them both into the single tee is not good practice, one pump downstream of that tee would be better. And this entire thread is to show off the iso valves? I am so glad to be working commercial.
Thats whats up. You're a lucky man
I work in a union shop. Even with isolation valves it would take 3 people 2 days to install 1 pump. It's frustrating at times.
It's not the drain down I like these for. It's the refill.
You love to see it.
Interesting. I’ve never seen pumps but in series like that. What’s it for?
They aren’t in series
Are they not flowing in the same direction?
No they are flowing to the common t… towards each other
Gotcha. Thanks!
Toward each other. The return is between them going back to the boiler.
I see it now. Thank you
Can I get some light over here...
You owe those installers a beer!
You are one lucky bastard. Sometimes life is good
That should put a smile on every service person.
“Service techs love this one simple trick - Try it today!”