Low water pressure in shower

Hello everyone.
I'm new to this forum so I apologize if my question is a repeat.

I bought a house in South Florida and the guest shower has low water pressure from both spiget and shower head. I swapped out the cartridge behind the shower handle (single handle), but still same problem.

I have a Delta series 13/14 shower set up. The model number of the cartridge I used is RP46074.

Can someone please advice what I need to check, or replace?

Thank you in advance,
Ray

If you look down inside the showerhead you'll see a washer which constricts the water flow. If you take a drill and enlarge the hole, thereby increasing flow, this worked for me

Glock26USMC said:

If you look down inside the showerhead you'll see a washer which constricts the water flow. If you take a drill and enlarge the hole, thereby increasing flow, this worked for me

Click to expand...

Hello Glock, I checked the shower head and there was no restrictor.

Also, before I turn on the water I removed the shower head and the spiget. The water still came out pretty low.

Any ideas?

Try taking the shower head off and putting a gauge on the down spout, just worked for me recently.