Industry Trusted. Built on Real Expertise.
The Backflow Depot is Northern California's go-to source for backflow prevention parts, equipment, and Sub Zero Covers freeze bags. We're not just a parts supplier — we're backflow professionals.
From the Field to the Warehouse — We Know Backflow
The Backflow Depot started as an extension of All Pro Backflow, Inc. — a backflow testing, repair, and installation company serving Northern California. After years of working in the field, we saw a gap: getting quality backflow parts quickly and at fair prices was harder than it should be.
So we built The Backflow Depot. Today we stock over 1,000 SKUs from brands like Watts, Febco, Wilkins, Apollo, Ames, and Deringer. We serve plumbers, municipalities, property managers, and contractors across 16 Northern California counties.
But we didn't stop at parts. We partnered with Sub Zero Covers to bring pros premium, USA-made backflow freeze bags in over 50 sizes — standard and custom — recommended by people who actually work on backflow preventers every day.
Sister Company of All Pro Backflow, Inc.
Our roots are in the field. All Pro Backflow has been testing, repairing, and installing backflow preventers across Northern California for over 25 years. That hands-on experience means when you call The Backflow Depot for a part, you're talking to people who've actually used it.
We don't just read spec sheets — we know which parts fail, which brands hold up, and which freeze bags actually protect devices in real California winters. That expertise is baked into everything we do.
What Sets Us Apart
Quality First
Every part and freeze bag we sell meets our rigorous quality standards. We stand behind everything with our name on it.
Real Expertise
Our team has decades of hands-on backflow experience. We don't just sell parts — we install, test, and repair backflow preventers every day.
Authorized Sub Zero Covers Dealer
We're an authorized dealer for Sub Zero Covers freeze bags — premium, USA-made insulation blankets. We help you get the exact right fit, standard or custom.
Fast Shipping
We know downtime costs money, so we move fast to get you the parts you need.
Honest Pricing
Fair, competitive pricing on freeze bags and all parts. Honest quotes with no games — just straight answers and good value.
BBB Accredited
We've earned our BBB accreditation through years of honest business practices. Our reputation in the industry speaks for itself.
In the Field, Every Day
From crane installations to emergency repairs — we do it all.
Licenses & Accreditations
Ready to get the right parts? Talk to a backflow expert.