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Aerator in shower head is plugged up. Unscrew head, clean it out, and replace. Make sure you have Teflon tape on hand for the treads on the shower arm when putting the head back on.

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Q: Why pressure at shower head with valve on but shower not on?
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If you replaced both cartridges on a shower valve due to very low water pressure and still no water pressure you removed cartridges and turned water on and water pressure is good?

May be build up in the valve itself or the shower head.


How do you keep shower temperature from changing when someone flushes the toilet or uses another sink?

Your water pressure is low. Consequently, when cold water is diverted to another application such as a toilet or a sink, the amount of cold water available at the shower mixing valve decreases as the low pressure is unable to keep up with the shower's demand. This causes a hotter mixture at the shower head. The solution is to either improve the cold water supply to the shower or to replace the shower control valve with a temperature compensating type. Pressure balancing is the cheapest and simply changes the shower temperature according to the pressure in the cold and hot water lines. When the toilet or sink is used, reduced pressure to the shower valve is detected and the valve reduces the hot water pressure, thereby maintaining the temperature. The more sophisticated approach is a thermostatic shower control valve. These are significantly more expensive, but will not reduce the pressure at the shower head (a drawback of the pressure balancing valve). The thermostatic valve would be required when one shower control valve is operating several shower heads. Moen, Kohler and Delta all make both types of control valves. They can be readily obtained from a local plumbing supply house.


The hot water pressure in the shower is still low after replacing the valve stem and seat?

Open up the actual shower head and remove the factory fitted restrictor.


Can you add an extra shower head to your shower just by cutting a tee into the shower head riser or will you lose pressure to both heads?

Yes, you can install a tee in the riser. The pressure loss will be minimal since both shower heads will have a flow restrictor unless you remove them. If you remove them, you probably wont notice any difference. If you do notice a difference, put the flow restrictor back in the closest shower head to the shower valve.


What shower heads have the strongest spray for a really good shower?

The force of the spray from a shower head has more to do with the water pressure delivered by your plumbing. Some shower heads do have a valve that allows pressure to build in the shower head, thus delivering a more powerful spray, but sufficient water pressure would be necessary from the source. Visit the home improvement store and talk about the various options with a knowledgeable salesperson.


What would cause low pressure in a shower when you have replaced the hot water line out of the water heater?

you have trash in your line take the shower head off and remove trash or possibly in water valve at shower


What would cause the shower head to leak when the shower pin is not pulled?

Seats in the main valve body are leaking by, allowing water to go to the shower head.


Why the shower head still leaks when turn off the water?

The valve in the shower control needs to be renewed.


How do you figure the output of your shower head?

By measuring each hole in the shower head and getting the pressure and then mathematically it can be figured out


Why would you lose pressure in your shower head when the pressure in the tub is fine?

There is a screen and/or a water saver in the shower head. The screen may be plugged with sediment from in the water.


What causes a squeal when you use the shower diverter?

It's usually due to a combination of two things: back pressure from the shower head, aggravated by the newer low-flow shower heads, acting against a slight leak at the diverter valve. I find that it gets worse after I've been away for a few days and assume that there's scale build-up in both places... the shower head and the diverter. You can try using a descaling solution on the shower head and/or checking that the diverter valve is seating properly and possibly greasing its seat with some silicone grease.


What is the velocity of an average shower head?

The velocity does not depend on ther shower head, however it does depend on the cold mains pressure, a higher pressure will result in a higher velocity, and visa versa.