John Wood Restricted Hot Outlet / Scaling

John Wood water heater hot water pressure is significantly lower than cold water pressure

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Scaled or partially blocked hot outlet nipple, Debris in hot side shutoff valve, Clogged mixing valve or check valve, Collapsed flex connector

Safety: Turn off cold water supply and relieve pressure before disassembling piping.

1. Check fixtures: Remove and clean aerators on faucets and showerheads to rule out local restrictions.
2. Inspect hot shutoff valve: Fully open the hot outlet valve and verify it is not partially closed or clogged.
3. Remove hot nipple: If accessible, remove the hot outlet nipple and check for scale or debris. Replace if restricted.
4. Service mixing valve: If a mixing valve is installed, clean or replace it if internal passages are blocked.

Medium 3/5

Hot Outlet Nipple / Mixing Valve

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