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Backflow valve

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Home / / Backflow valve refurbished & used for sale | For Sale USA
350 double check backflow - 1-350,

350 double check backflow - 1-350,

$138.00
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Febco 765 pvb 1in - febco, 765-qt-fz

Febco 765 pvb 1in - febco, 765-qt-fz

$79.99
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Zurn wilkins 975xl2 4 - zurn,

Zurn wilkins 975xl2 4 - zurn,

$375.00
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975xl2 reduced - 3/4",

975xl2 reduced - 3/4",

$280.25
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Watts double check valve - double,

Watts double check valve - double,

$157.98
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Watts b911s m3 - watts, 1/2"

Watts b911s m3 - watts, 1/2"

$159.99
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Pvc white plastic - pvc,

Pvc white plastic - pvc,

$7.99
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Watts bronze double - 1”,

Watts bronze double - 1”,

$145.00
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720a pressure vacuum - 720a,

720a pressure vacuum - 720a,

$60.17
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M3 backflow preventer - backflow,

M3 backflow preventer - backflow,

$26.95
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Zurn wilkins 1 975xl - 1", 1-975xl

Zurn wilkins 1 975xl - 1", 1-975xl

$419.99
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Inch one way spring - 1,

Inch one way spring - 1,

$14.57
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Zurn wilkins 350xl - in.,

Zurn wilkins 350xl - in.,

$199.00
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Zurn wilkins 975xl2 1 - 1-975xl2,

Zurn wilkins 975xl2 1 - 1-975xl2,

$425.00
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Watts bronze quarter turn - quarter,

Watts bronze quarter turn - quarter,

$225.00
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Zurn wilkins 350 double - 1”,

Zurn wilkins 350 double - 1”,

$275.00
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Watts double check valve - check,

Watts double check valve - check,

$99.99
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Watts bronze double - in.,

Watts bronze double - in.,

$130.00
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350 double check - double,

350 double check - double,

$119.40
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Zurn wilkins 720a - zurn, 1"

Zurn wilkins 720a - zurn, 1"

$98.00
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Inch lead brass check - no-lead,

Inch lead brass check - no-lead,

$24.80
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Watts bronze quarter - 1, in.

Watts bronze quarter - 1, in.

$197.88
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Bronze double check - in.,

Bronze double check - in.,

$95.34
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Complete repair kit - repair,

Complete repair kit - repair,

$22.49
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720a pressure vacuum - 1",

720a pressure vacuum - 1",

$79.99
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Pcs 2 inch - 1-1/2,

Pcs 2 inch - 1-1/2,

$30.92
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Inch pvc backwater valve - 2,

Inch pvc backwater valve - 2,

$34.99
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Inch m3 backflow - inch, 9d-m3

Inch m3 backflow - inch, 9d-m3

$31.57
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Zurn wilkins 975xl2 2 - zurn, 975xl2,

Zurn wilkins 975xl2 2 - zurn, 975xl2,

$325.00
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Watts b911s comb - b911s-m3, fill

Watts b911s comb - b911s-m3, fill

$174.99
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Backflow preventer valve 4 - 4", valve,4

Backflow preventer valve 4 - 4", valve,4

$79.86
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Watts 007m1 1in double - watts,

Watts 007m1 1in double - watts,

$159.99
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For pvb backflow preventer - for,

For pvb backflow preventer - for,

$69.90
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350 double check backflow - 1-350,

350 double check backflow - 1-350,

$102.00
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Febco backflow lf850 - febco, lf850-qt

Febco backflow lf850 - febco, lf850-qt

$130.00
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New 350 4in bronze - 34-350,

New 350 4in bronze - 34-350,

$119.95
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Watts double check - watts,

Watts double check - watts,

$164.88
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Zurn wilkins 975xl2 - zurn, 34-975xl2

Zurn wilkins 975xl2 - zurn, 34-975xl2

$449.00
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Watts lf009m2 female rpz - watts,

Watts lf009m2 female rpz - watts,

$269.99
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Backflow preventer febco - backflow,

Backflow preventer febco - backflow,

$89.99
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Rpz backflow preventer - 3/4, in

Rpz backflow preventer - 3/4, in

$199.99
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Zurn dual check - 1/2,

Zurn dual check - 1/2,

$35.99
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Zurn wilkins double check - double,

Zurn wilkins double check - double,

$209.99
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Pcs npt thread - 2,

Pcs npt thread - 2,

$37.23
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975xl2 reduced - 3/4",

975xl2 reduced - 3/4",

$300.00
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Watts bronze double - 3/4,

Watts bronze double - 3/4,

$154.89
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Watts 007m1 1in double - 007m1-qt,

Watts 007m1 1in double - 007m1-qt,

$139.99
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Watts bronze quarter - bronze,

Watts bronze quarter - bronze,

$153.99
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Backflow protector duckbill - backflow,

Backflow protector duckbill - backflow,

$17.66
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350 double check backflow - double,

350 double check backflow - double,

$132.95
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Backflow check valve - backflow,

Backflow check valve - backflow,

$74.69
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Watts bronze double - watts,

Watts bronze double - watts,

$179.88
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Brass one way check valve - brass,

Brass one way check valve - brass,

$14.36
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350 double check backflow - double,

350 double check backflow - double,

$138.00
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Pressure vacuum breaker - 1",

Pressure vacuum breaker - 1",

$62.29
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Bronze double check - in.,

Bronze double check - in.,

$150.00
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Watts sd3 dual check - sd3-mf,

Watts sd3 dual check - sd3-mf,

$179.99
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New 375a zurn wilkins - new, 3"

New 375a zurn wilkins - new, 3"

$3569.99
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2pk watts lead - watts, lead-free

2pk watts lead - watts, lead-free

$68.99
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Lead brass check valve - no-lead,

Lead brass check valve - no-lead,

$24.80
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Watts 3 stainless - 3/8", sd-3

Watts 3 stainless - 3/8", sd-3

$175.00
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Rk34 375 complete - rk34-375,

Rk34 375 complete - rk34-375,

$47.99
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Watts sd3 stainless dual - 3/8",

Watts sd3 stainless dual - 3/8",

$169.00
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Fip white plastic pvc inline - pvc,

Fip white plastic pvc inline - pvc,

$9.99
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Inch ips female - female, threaded

Inch ips female - female, threaded

$23.06
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Pack dn25 brass foot - 2,

Pack dn25 brass foot - 2,

$15.85
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Watts bronze double - in.,

Watts bronze double - in.,

$144.95
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Watts fpt lead - watts,

Watts fpt lead - watts,

$45.00
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Watts tk99e valve backflow - 5,

Watts tk99e valve backflow - 5,

$699.99
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Watts regulator 007 qt - 1/2",

Watts regulator 007 qt - 1/2",

$166.49
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Brass dual check - dual,

Brass dual check - dual,

$35.00
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Brass dual check valve - dual,

Brass dual check valve - dual,

$37.99
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Watts 9dm2 backflow - 9dm2,

Watts 9dm2 backflow - 9dm2,

$69.99
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Brass check valve - 1",

Brass check valve - 1",

$24.80
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Watts pressure zone valve - watts,

Watts pressure zone valve - watts,

$179.99
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Watts 007m1 qt - 007m1-qt, 007m1-qt-fz

Watts 007m1 qt - 007m1-qt, 007m1-qt-fz

$314.45
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Zurn wilkins 975xl2 reduced - zurn, 2"

Zurn wilkins 975xl2 reduced - zurn, 2"

$799.99
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Watts automatic fill valve and - watts,

Watts automatic fill valve and - watts,

$20.00
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Zurn wilkins 975xl2 - zurn,

Zurn wilkins 975xl2 - zurn,

$180.00
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Inch pvc backwater - 2, valve

Inch pvc backwater - 2, valve

$30.79
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Zurn wilkins in - zurn,

Zurn wilkins in - zurn,

$199.00
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Pvc check valve backflow - check,

Pvc check valve backflow - check,

$35.00
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Watts 1in bronze double check - watts, 1in.bronze

Watts 1in bronze double check - watts, 1in.bronze

$164.99
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720a pressure vacuum - 3/4",

720a pressure vacuum - 3/4",

$68.99
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950xlt2 double check - in.,

950xlt2 double check - in.,

$180.00
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Pack dn25 brass foot - brass,

Pack dn25 brass foot - brass,

$14.86
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Watts inch 007m1 double - watts, 007m1-qt

Watts inch 007m1 double - watts, 007m1-qt

$115.35
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Febco 1313 860 reduced - 1313,

Febco 1313 860 reduced - 1313,

$269.95
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White pvc backwater - ​4',

White pvc backwater - ​4',

$62.37
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Oatey pvc backwater - pvc,

Oatey pvc backwater - pvc,

$35.99
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Inch dn40 brass female - dn40,

Inch dn40 brass female - dn40,

$30.90
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Backflow bleed off - backflow, valve

Backflow bleed off - backflow, valve

$45.00
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Zurn wilkins 760 inch - wilkins, 1/2"-inch

Zurn wilkins 760 inch - wilkins, 1/2"-inch

$39.95
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Watts bronze reduced - 3/4,

Watts bronze reduced - 3/4,

$299.99
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Zurn wilkins 38ufx38f - wilkins, 38ufx38f-700xl

Zurn wilkins 38ufx38f - wilkins, 38ufx38f-700xl

$49.99
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Apollo valves 4alf204a2f - apollo,

Apollo valves 4alf204a2f - apollo,

$374.99
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📊96 listings · from $7.99 · avg $178.27

Browse 96 backflow valve listings currently in our index. Prices range from $7.99 to $3569.99, with an average of $178.27. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about backflow valve →

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Everything you need to know about backflow valve

Whether you are looking for a brand-new or second-hand backflow valve, eBay offers one of the largest selections available online. With 96 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at $7.99, while premium listings can reach $3569.99 — giving you a wide budget spread to work with. The average price of $178.27 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.

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