I changed the water heater in my mobile home and now the water pressure is down.
One shower trickles and the other does not work at all.

Any ideas?

Thanks!

Filter in your shower head is clogged with debris. Remove shower head, run water for 30 seconds w/o shower head installed. Clean shower head filter under running water and reinstall. That should do. Back to you. Milo

All other fixtures run fine? If so, Milo nailed it. Clean them shower heads and let us know how things work out.