Kitchen water system

Sink and faucet

Choose a sink large enough to work but not so large it encourages waste. A low-flow aerator, pull-out sprayer and shutoff-friendly handle help. Confirm faucet pressure/temperature ratings and accessible supply connections.

Drinking tap

A dedicated tap lets strong filtration serve only consumed water, preserving flow and cartridge life. Keep untreated and treated lines distinct and avoid any bypass that can cross-connect them.

Drain

Use a serviceable strainer and trap/waterless trap. Provide slope and cleanout access. Flexible hose must not sag into unintended traps or rub through.

Food and grease

Scrape plates, use a sink screen and wipe grease before washing. Kitchen debris is the main cause of grey-tank odor and slow drains. Never rely on harsh chemicals that may damage seals or violate disposal rules.

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.