Leak prevention

Common points

Leaks cluster at pump swivels, NPT adapters, heater ports, faucet tails, filter housings, clamps, tank penetrations and unsupported transitions. Minimize joint count.

Technique

Cut tubing square, deburr as required, fully seat fittings, use the exact crimp tool/gauge, place clamps behind barb ridges and torque threaded/plastic housings only to instructions.

Design for failure

Use isolation valves, drip pans/drains where safe, leak sensors near tank/pump/heater and accessible panels. Route water so a leak is visible before it reaches electrical equipment or insulation.

Vehicle motion

Add flexible transitions, proper supports and strain relief; recheck after first rough roads and temperature cycles. Do not use sealant as structural support.

Build rule

If you cannot reach it, isolate it, drain it and explain its pressure/temperature or water-quality job, it is not ready to hide behind a wall.

CHAPTER CHECK

• I can explain the purpose and failure mode of each item in this chapter. • I know which manufacturer limit or water-quality claim controls my choice. • I added the valve, access, drain, measurement or maintenance task to my drawing/checklist.