Your 2-inch thick cabinet bottom and poorly routed PEX lines are classic examples of RV manufacturers prioritizing cost over space efficiency. These issues can be addressed through cabinet modification and PEX rerouting.
For RV showers, the Symmons Temptrol and Phoenix PF213200 are top mechanical thermostatic mixing valves. Digital models like the Kohler DTV+ require significant electrical modifications that aren't practical for most RV installations.
Atwood 90029 mixing valve has internal O-rings that deteriorate during storage. Can attempt rebuild with new O-rings, but full replacement often better choice after 8 months sitting. Valve is reasonably priced and straightforward to replace.
RV PEX connections use crimp rings, not compression fittings. For DIY repair, PEX cinch clamps with ratchet tool are easiest. SharkBite push fittings are tool-free but cost more. FIP refers to threaded connections at valves and fixtures.
Low water pressure with 40 PSI at regulator indicates restriction downstream. Check inline water filter, city water check valve, and any winterization valves. Pump running on city water confirms restriction.
Everything you need to know about RV plumbing systems from fresh water supply to waste management.
You can remove a Dometic 10-gallon water heater from behind the refrigerator by creating temporary access through the exterior compartment or carefully maneuvering connections from the front. Most cases don't require refrigerator removal with proper technique.
Yes, using a 3/8" braided supply line on your pump discharge will reduce flow rate compared to 1/2" PEX, but it can work effectively for vibration dampening if sized appropriately for your specific application.