Water pump slows to a trickle

30 seconds seems like a long time to pressurize the system. Does it stay pressurized or does the pump cycle intermittently? If the pump comes on say in 10 minutes look for a leak after the pump or check the fresh water fill for a faulty check valve. In over 37 years of Rving in 8 different Rvs we have had:

• A cracked pump strainer
• Cracked lines
• Fitting leaks
• Bad pump diaphragms
• A name brand faucet leaking from the brass body at line inlets (last year)
• Water pump leaking through the back of the pump motor (new coach, 2 months since delivery)
• Bad fill check valves (3 times)
• Bad water heater check valve (a first this winter)
• Bad water heater by-pass valve
• Bad water heater pressure relief valve (2 times)
• Leaking water heater tank
• Debris in faucet strainers
• Going way back, a bad air compressor head gasket on a pressurized system with a metal fresh water tank

Any can cause water problems at the faucet, just start at the fill and work toward each faucet or valve. I have heard of loosing water through the ice maker supply lines, still waiting for that one to happen.