How do you remove old plumbing parts - Grohe Integrated 1/2'' Shower Thermostatic Rough-In Valve With Stops - 3412

Check youtube there are videos showing a full replacement install. If you can do plumbing this can be a DYI job. Or you also can save some money by buying the boiler and removing the old and hiring a plumber to the install. Some plumbers wont do that, so check first.

https://www.homeadvisor.com/cost/heating-and-cooling/install-a-boiler/

Pressure relief valves open on high temperature as well as high pressure. They do go bad and are replaceable.

Consider calling the plumber. It is not very expensive part and the plumber can change it quickly.

If you just want to do it yourself:

1. Write down the make and model of the water heater.
2. Go to a real plumbing store and buy a new one.
3. Turn off the heat source (the gas or electricity)
4. Turn off the water inlet and open a hot water valve at any sink to take the pressure off the heater.
5. Remove the old relief valve. It may take a long handled wrench.
6. Install the new pressure relief.
7. Close the sink valve.
8. Turn on the water and check for leaks.
9. Turn on the heat source.

Good luck.

The copper straps are grounding straps. Connected directly to the plumbing they serve 2 purposes. 1. Electrical ground incase of short circuit of the heating elements. 2. Provide grounding of minor electrical currents created by dissimilar metals in a conductive fluid, which can cause accelerated corrosion.

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having hot water trickle out all day will make the whole unit hot,, to the touch,, what you need to do , is turn off both the water supplys under the sink,, then remove the handle by removing the hold down screw,, after that , remove the hot water valve,, Just remove the nut that's on the outside of the fixture, what your going to find is at the end of that valve, is a washer,, made of hard rubber,, that needs replacing,, but also, inside of the fixture is a washer seat, its either brass or stainless steel,, that takes a seat tool wrench to remove that ,, but to make sure its repaired completely, both the washer and seat need to be replaced, seat tools are pretty inexpensive at Lowes , or Home depot,, and thats where you can get the parts you need also,, be sure and compare the old parts with the new, so take them with you when you go, most hardware stores that have plumbing supplies will have what you need, the seat just unscrews , but they can be a little tough,, if you decide to get a seat tool, they have straight ones and 90 degree ones ,, the straight ones you'll need a wrench to assist turning in the removal and install,

There are 2 sizes; 1/2 inch and 3/4 inch. Remove the old one after draining the water heater and shutting off the water supply then take your old one to a plumbing supply outfit like George Morlan's. Make sure you wrap the new threads with teflon tape at least 3 wraps while holding the spigot in your left hand so the tape won't come off as you install the spigot. Good luck!!

did you try a well stocked plumbing supply house not a real big sale for him so you might have to tell him you may need like 1000 of them to motivate him to look

remove the old one then take it with you try going to Lowe's or Home Depo or any plumbing supply they will point you in the right dirrection