Pvc tail piece won't stay connected kitchen sink

We have a brand new 20 gallon water heater. We changed the element to a 240v (electric was originally set up for a 30 gallon tank which was 240v so we decided to change the element to heat the water up faster). However, we noticed that the cold water pipe is connected to the hwh where on the hwh...

I have a double sink in the kitchen (one side has a grabage disposal). The bathroom that is downstair is located directly beside it. When my kitchen sink clogged up the food from the grabage disposal came out of the bathroom sink. The plumber fixed it and explained that there was a t connecter that...

I am trying to replace an old sink in my bathroom. I shut off the cold water supply. What I thought was the hot water shutoff, however, did not shut the water off to the sink but shut off the hot water line at the point it connected to the COLD water line (after the line branched off to the...

My bathroom pipes busted and there where no taps to turn off water so I turned the valve off connected to my hot water heater to stop the water flow, is this wise??