Simple Battery-Timer Drip System for Potted Plants on a Hose Bib

For a temporary drip system watering pots from an outdoor faucet while you're away, keep it simple and reliable.

Components

1. Hose-thread adapter (female hose × ½" MPT or barbed) to connect drip tubing to the faucet.
2. Battery-operated timer (e.g., Rain Bird, Orbit, Melnor)—installs inline between faucet and adapter. Set start time, duration, frequency.
3. Backflow preventer (hose-thread vacuum breaker)—often built into the timer or required by code.
4. Pressure regulator (15–25 psi) if your pressure exceeds 30 psi.
5. Filter (150 mesh) to protect emitters.
6. ½" poly mainline to the pots, with ¼" distribution tubing and emitters at each pot.

Assembly Order (from faucet out)

Faucet → Timer → Backflow preventer → Filter → Pressure regulator → Adapter → Mainline → Pots.

Tips

• Use stakes to secure ¼" tubing in pots.
• Test run before leaving; check each emitter.
• Set timer for early morning to reduce evaporation.
• Remove batteries for winter storage.

All parts are available at irrigation supply stores or well-stocked hardware stores. Total cost: $60–$120 depending on pot count.