Doing a full replumb - tips on what to review with the plumber?

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Every time I hire a contractor I come out the other side with a few notes of what to make sure I discuss at the start the next time around. I'm getting ready to do a full replumb on a gutted house (kitchen, 2.5 bath, baseboard radiators). Any tips on things to make sure I discuss with the plumber at the start?

@Steve Emling do you have your fixtures picked out? Although more expensive, I swear by Grohe (as do most plumbers worth their weight). You don’t want a cheap shower valve go bad in the wall; the repair will be much more expensive than the extra cost of fixtures.

Also, depending on the size of the house, I would see what type / size water heater they are installing, and if they will be installing a re-circ pump to provide hot water to the fixtures quickly.

I assume they will be running pex, but you should double check.

Verify if they will be pulling / paying for the plumbing permit and calling in their own inspections.

Lastly, you want to make sure that their contract (as well as any contractor / sub contractor) states if they will be removing their own garbage from the job site. This hauling and disposal can really add up, and you want to make sure you are covered for that expense

I am  plumber from massachusetts as far as things to discuss with the plumber go just make sure you give him a solid time frame that is agreed upon by both parties and make sure you know the answers to his questions. for example finish work like what kind of faucets, what color toilet etc. the little things is what slow the process down. As far as the mechanical work goes thats all on him. he will be piping everything to code (hopefully). if he asks you what type of material you would like to use on this project copper is best for water lines as for one copper joints are stronger than plastic and two copper is natural so your not drinking something that was sitting in plastic for god knows how long. now a days the go to is pex which is fine and also cheaper. Drainage should be standard usually its pvc which is the most common anyway. I see you mentioned baseboard so I'm assuming you have a boiler. I would go with efficiency. installing a high efficiency boiler is a little more expensive but just remember it is a selling point.