Cross-connections: hose bibs and toilet fill valves
Monterey Park's water report names hoses without vacuum breakers and fill valves without an air gap as cross-connections.
Updated · 3 min read
Bottom line
Monterey Park's water report lists three common cross-connections: a hose on a hose bib without a vacuum breaker, a toilet fill valve without the required air gap, and irrigation without backflow protection. Two of them are checks you can do in a minute.
Contents
What a cross-connection is
The city's water quality report explains that many water-use activities can introduce substances that cause aesthetic or health concerns if they enter the distribution system. Contamination can happen when pressure in the equipment is higher than in the drinking water line, which is called backpressure. It can also happen when pressure in the drinking water line drops, for example from a main break or heavy demand, and contaminants are sucked in, which is called backsiphonage.
The three the city lists
- A garden hose connected to a hose bib without a vacuum breaker
- A toilet tank fill valve lacking the required air gap
- A landscape irrigation system without proper backflow prevention
Check the hose bib
Look at each outdoor tap. If a hose screws directly onto bare threads and the end of the hose sits in a bucket, pool or sprayer, the tap needs a vacuum breaker. Screw one on and leave it.
Check the toilet tank
Lift the lid. The fill valve has a mark showing its critical level, and that mark should sit above the top of the overflow tube so tank water cannot be drawn back into the supply. If the valve is submerged, replace it.
Getting help in Monterey Park
Toilets in Monterey Park homes get heavy daily use. For this job, start with our toilet repair page, then send us a note or text (310) 628-9399.
Who handles what
The fixtures in your house and yard are yours to maintain. If you are unsure whether your irrigation system has backflow protection, the City of Monterey Park can point you to the right contact.
Before you call
Is a cross-connection a leak?
No. It is a path for water to move the wrong way, usually when pressure drops.
Can I add a vacuum breaker myself?
Often yes, since it threads onto the spout. If the bib is corroded or loose, send us a photo first.
Why does the city's report mention this?
Cross-connection control is part of protecting drinking water quality inside homes and businesses.