sponge. 1. a porous, absorbent mass, as a pad of gauze or cotton surrounded by gauze. 2. the elastic fibrous skeleton of certain species of marine animals. absorbable gelatin sponge a sterile, absorbable, water-insoluble, gelatin-base material, used as a local hemostatic. (spÅ­nj).
The water heater is the first place to start when there is no hot water in the shower. A shower should be counted on to be good and hot when you need it to be. But keep in mind that the hot water coming from a shower is coming from your hot water heater tank.etermine if the problem is whole-house related or just affecting the shower. Turn on every hot water faucet and check the temperature of the hot water. If they all start out hot but cool quickly, a burner in the water heater may be the cause. If they never get hot, a faulty dip tube may be the problem.
Instructions. Check to make sure there is no valve on the hot water line somewhere in the house that is turned off and preventing hot water from reaching the shower. Pry off the cap of the valve handle, if there is one, with a screwdriver and then unscrew the handle from the faucet stem.f so, loosen it with an allen wrench and remove the handle. Then pry the escutcheon from the wall and remove it. Check the posi-temp valve on the hot water inlet. If it is in the vertical, off, position, rotate it 1/4-turn to the horizontal position with a screwdriver.