Installing laundry sink help a novice plz!

jbreston

Hi all,

Im installing a laundry sink in the utility room in the basement. To connect cold water supply I turned off the house main water supply(there are two ball valves: one before the meter and the one after) and ran the copper line sweating the joints to the sink location. Now for the hot water supply - I really am stumped. I have an oil boiler utica with tankless coil the hot water line comes out of the boiler and runs directly to the bathroom faucet branching on the way for kitchen faucet and washing machine each has a valve to shut off the supply. However, there is no valve to shut off the hot water for the hot water output line as a whole. I dont want to branch off of the bathroom/kitchen/washingmachine line - I'd much rather branch off of the main line. How do i do that? Do i just shut off the cold water supply to the house/turn off the boiler and open the hot/cold water faucet at the lowest altitude in the house and wait until the hot water drains? When i turn the main supply on is there anything special I need to do to prevent any damage to the boiler? Do I need to worry about expansion tank? Would I also have to purge the air in the radiators when the heat is turned back on?

Sorry for all the silly/novice questions and I appreciate any feedback you can provide.

thank you!!

J

russiand

You almost got it

Shut the cold water main off. Shut off power to the boiler, you should have a service switch on it and mayber another one upstairs. Open the hot water faucets for a little while to let out the pressure. If you have valves on the copper going upstairs shut off as many as you can, so that you don't get too much water draining down. At that point you should be good to cut your copper, try to capture the water that leaks out so as to not damage the basement too much. You sould be able to solder in your tee's and whatever copper you need at that point. The boiler water and your tankless coil in it are isolated from one another and there is no need to touch expansion tank on the boiler, etc. The tankless coild is under city water pressure, and boiler is under it's own much lower pressure. Hope this helps.

russiand

Forgot to mention

Be careful when cutting the hot water pipe as to not burn yourself. The lack of a valve that you mention could be remedied when you are doing this procedure, so that you can cut the hot water to the whole building when necessary. One can't have too many shutoffs. Once you are doing with your soldering turn the cold water back on and check for leaks. Run the new faucets on on the hot side to fill the coil and flush out any flux, etc. Once happy with your work, you can turn the boiler back on. Again there is no need to touch anything on the boiler, if this is the only work you are doing on it, as the two systems are isolated. No bleeding of radiators, etc. There will be air in your water pipes so open the faucets slowly the first time.

jbreston

thanks a bunch for the help!

I really appreciate it!