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Old 04-26-2016, 03:43 AM   #1
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Default Increase pipe size???

I'm bidding a job (remodel) and the blueprint shows cold water 1" coming into a commercial water heater and the outlet (hot water) is 1 1/4" feeding 6 washing machines, a tank type toilet, and a lav. There's a recirculating pump on this setup as well. My question is can I increase the pipe at the outlet of the water heater? It shows this on both the isometric and heater detail drawings.
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Old 04-26-2016, 08:23 AM   #2
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Why does the W/H feed a toilet?
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Old 04-26-2016, 08:35 AM   #3
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another reason why I dont like engineers or architects..they have no clue about plumbing..and seems they are clueless about most stuff as they never has any life experience in the field and work with pencils and now cad software on a computer that does half the work for them..if you ask them why they did something in a drawing they cant explain it other than thats the way its done...
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Old 04-26-2016, 10:38 AM   #4
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you can't increase beyond the size of the water heater connection on the outlet side.

If it is only 1" out, your stuck, unless you get a WH with 1 1/4".

That's one of them there fancy hot water water closets..............
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Old 04-26-2016, 11:14 AM   #5
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Bidet? Bidet toilet seat?
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Old 04-26-2016, 04:54 PM   #6
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Bid as drawn and note the discrepancies in your proposal.
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Old 04-26-2016, 06:20 PM   #7
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I call the engineer when I come across that or the contractor I'm bidding for. Discrepancies usually come up at the pre bid meeting.
I don't believe I've seen a plan without discrepancies in it ever.
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Old 04-26-2016, 10:34 PM   #8
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Bid a job one time that called for 2 1/2" cast drain lines. Got a fat change order upsizing to 3" and the engineer had to suck it up on his errors & omissions policy.

He didn't like me after that.
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Old 04-27-2016, 12:46 PM   #9
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Quote:
Originally Posted by hroark2112 View Post
Bid a job one time that called for 2 1/2" cast drain lines. Got a fat change order upsizing to 3" and the engineer had to suck it up on his errors & omissions policy.

He didn't like me after that.
2 1/2" is shown on drain and vent lines all the time on jobs I bid on. We (including every contractor I know) assumes it to be 3".
Making the engineer take the fall and pay the difference is gangster.
If that happened over here, I can picture the engineer finding ways to make the job miserable for the plumber. At least I would if I were the engineer. I would make sure every nut and bolt is as per submittals, and would demand shop drawings for anything deviating off of the approved plans.
How tough was it to upsell 3" over 2 1/2", in other words, to convince the owner that it wasn't a common error?
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Old 04-27-2016, 08:12 PM   #10
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Quote:
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How tough was it to upsell 3" over 2 1/2", in other words, to convince the owner that it wasn't a common error?
Better question, how do you prove a price difference on a nonexistent pipe that wouldn't have a price to begin with?
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