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Backflow valve

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Backflow valve for sale on largest auction and classifieds sites

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

350 double check backflow - double,

$138.00
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975xl2 reduced - 34-975xl2, 3/4"

975xl2 reduced - 34-975xl2, 3/4"

$280.25
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Watts 007m1 1in double - 1in,

Watts 007m1 1in double - 1in,

$129.99
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Backflow preventer valve - preventer, valve,4

Backflow preventer valve - preventer, valve,4

$79.86
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Watts b911s m3 - watts, 1/2"

Watts b911s m3 - watts, 1/2"

$159.99
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720a pressure vacuum - 720a,

720a pressure vacuum - 720a,

$60.17
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Watts bronze double check - double,

Watts bronze double check - double,

$145.00
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Watts double check valve - watts,

Watts double check valve - watts,

$157.98
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Watts 007m1 1in - watts, double

Watts 007m1 1in - watts, double

$119.99
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Pvc white plastic solvent - white,

Pvc white plastic solvent - white,

$7.99
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Zurn wilkins 975xl2 - wilkins,

Zurn wilkins 975xl2 - wilkins,

$130.00
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Zurn wilkins 350 - double, check

Zurn wilkins 350 - double, check

$40.00
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Bronze double check - in.,

Bronze double check - in.,

$150.00
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Watts bronze quarter turn - watts,

Watts bronze quarter turn - watts,

$225.00
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Zurn wilkins 975xl2 2 - wilkins, 975xl2,

Zurn wilkins 975xl2 2 - wilkins, 975xl2,

$325.00
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350 double check - 34-350, 3/4"

350 double check - 34-350, 3/4"

$169.99
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Watts double check valve - check,

Watts double check valve - check,

$99.99
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Watts bronze quarter - in.,

Watts bronze quarter - in.,

$197.88
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Watts fpt lead - watts, free

Watts fpt lead - watts, free

$45.00
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Zurn wilkins 350xl - zurn, in.

Zurn wilkins 350xl - zurn, in.

$199.00
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Zurn wilkins 950xl double - wilkins,

Zurn wilkins 950xl double - wilkins,

$169.99
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2pk watts lead free - 2pk,

2pk watts lead free - 2pk,

$68.99
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Rpz backflow preventer - 3/4,

Rpz backflow preventer - 3/4,

$175.00
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Watts double check valve - 3/4",

Watts double check valve - 3/4",

$139.99
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For pvb backflow preventer - pvb,

For pvb backflow preventer - pvb,

$69.90
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950xlt2 double check - 1, in.

950xlt2 double check - 1, in.

$180.00
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Zurn wilkins double - zurn,

Zurn wilkins double - zurn,

$209.99
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Inch one way - one, spring

Inch one way - one, spring

$14.57
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Zurn wilkins 350 - zurn,

Zurn wilkins 350 - zurn,

$275.00
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Watts bronze double - 1,

Watts bronze double - 1,

$189.99
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975xl2 reduced - 34-975xl2,

975xl2 reduced - 34-975xl2,

$300.00
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Watts b911s comb fill - watts, b911s-m3

Watts b911s comb fill - watts, b911s-m3

$174.99
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M3 backflow preventer - 1/2", 9d-m3

M3 backflow preventer - 1/2", 9d-m3

$26.95
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720a pressure vacuum - 1",

720a pressure vacuum - 1",

$79.99
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Watts bronze double - watts, 3/4

Watts bronze double - watts, 3/4

$154.89
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Pcs 2 inch - 1,

Pcs 2 inch - 1,

$30.92
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Inch pvc backwater valve - backwater,

Inch pvc backwater valve - backwater,

$34.99
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350 inch double check - 3/4,

350 inch double check - 3/4,

$119.95
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Zurn wilkins 38ufx38f 700xl - zurn, 38ufx38f-700xl

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

$49.99
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Watts 007 double - watts, check

Watts 007 double - watts, check

$294.60
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Inch lead brass check - 1,

Inch lead brass check - 1,

$24.80
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Complete repair kit - 3/4"-1",

Complete repair kit - 3/4"-1",

$22.49
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Brass dual check backflow - 1/2",

Brass dual check backflow - 1/2",

$29.79
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Watts b911s comb fill - b911s-m3,

Watts b911s comb fill - b911s-m3,

$140.00
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Febco backflow lf850 - 3/4", lf850-qt

Febco backflow lf850 - 3/4", lf850-qt

$130.00
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Watts regulator 007 qt - watts,

Watts regulator 007 qt - watts,

$166.49
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For pvb backflow - for,

For pvb backflow - for,

$77.09
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Zurn dual check - zurn,

Zurn dual check - zurn,

$35.99
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Inch m3 backflow - 1/2,

Inch m3 backflow - 1/2,

$31.57
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Febco bronze pressure - febco,

Febco bronze pressure - febco,

$88.99
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Watts bronze quarter - watts, in.

Watts bronze quarter - watts, in.

$153.99
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Zurn wilkins 350xl - zurn,

Zurn wilkins 350xl - zurn,

$319.48
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For watts 0061888 3 4 - for,

For watts 0061888 3 4 - for,

$45.00
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Backflow preventer valve 4 - 4",

Backflow preventer valve 4 - 4",

$73.20
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Febco bronze pressure - 3/4”bronze,

Febco bronze pressure - 3/4”bronze,

$79.00
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Watts bronze double - 3/4",

Watts bronze double - 3/4",

$179.88
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Watts automatic fill valve and - watts,

Watts automatic fill valve and - watts,

$20.00
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350 double check - 1-350,

350 double check - 1-350,

$102.00
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Oatey pvc backwater - 4,

Oatey pvc backwater - 4,

$35.99
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Watts 2000wp cast - 3", iron

Watts 2000wp cast - 3", iron

$399.00
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Watts sd3 dual check - sd3-mf,

Watts sd3 dual check - sd3-mf,

$179.99
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350 double check backflow - 1-350,

350 double check backflow - 1-350,

$132.95
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Watts double check valve - watts,

Watts double check valve - watts,

$164.88
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Pvc 6in backwater - pvc,

Pvc 6in backwater - pvc,

$95.95
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Febco 1in bronze - (2),

Febco 1in bronze - (2),

$189.99
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Watts pressure zone valve - watts,

Watts pressure zone valve - watts,

$179.99
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Pcs npt thread spring - 2,

Pcs npt thread spring - 2,

$37.21
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Febco 1in bronze - febco,

Febco 1in bronze - febco,

$97.89
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Inch ips female threaded - inch,

Inch ips female threaded - inch,

$23.04
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Midline valve 4i2t112 pvc - midline,

Midline valve 4i2t112 pvc - midline,

$18.99
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Zurn wilkins 975xl2 4 - zurn, 3/4"

Zurn wilkins 975xl2 4 - zurn, 3/4"

$449.00
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Watts 007m1 bronze - watts, 007m1-qt-fz

Watts 007m1 bronze - watts, 007m1-qt-fz

$163.49
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Inch white pvc backwater - inch,

Inch white pvc backwater - inch,

$37.04
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Pack dn25 brass foot - pack,

Pack dn25 brass foot - pack,

$15.85
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Lead brass check - 1",

Lead brass check - 1",

$24.80
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Zurn wilkins 350 double - wilkins,

Zurn wilkins 350 double - wilkins,

$209.99
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Watts bronze quarter - bronze,

Watts bronze quarter - bronze,

$199.00
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Watts tk99e valve backflow - watts,

Watts tk99e valve backflow - watts,

$99.00
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Watts tk99e valve backflow - 5,

Watts tk99e valve backflow - 5,

$699.99
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Watts bronze quarter - in.,

Watts bronze quarter - in.,

$184.95
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Watts double check valve - 1, in.

Watts double check valve - 1, in.

$199.99
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Watts 007m1 fz double - watts, 1"

Watts 007m1 fz double - watts, 1"

$149.95
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Rk34 375 complete backflow - complete,

Rk34 375 complete backflow - complete,

$47.99
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Backflow protector duckbill - backflow,

Backflow protector duckbill - backflow,

$18.59
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Wilkins zurn npt - 3/4, backflow

Wilkins zurn npt - 3/4, backflow

$83.99
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New 375a zurn wilkins - new,

New 375a zurn wilkins - new,

$3359.99
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Zurn wilkins 975xl2 rpz - in,

Zurn wilkins 975xl2 rpz - in,

$1178.00
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Febco bronze pressure - 3/4,

Febco bronze pressure - 3/4,

$79.80
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Pressure vacuum breaker - 1",

Pressure vacuum breaker - 1",

$77.29
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Caleffi 573403a backflow - 573403a,

Caleffi 573403a backflow - 573403a,

$76.71
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720a pressure vacuum - pressure,

720a pressure vacuum - pressure,

$55.99
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Watts bronze backflow - watts,

Watts bronze backflow - watts,

$379.99
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Lf825y rp fs backflow - 2”, lf825y-qt-rp-fs

Lf825y rp fs backflow - 2”, lf825y-qt-rp-fs

$1399.99
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350 double check backflow - double,

350 double check backflow - double,

$138.00
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Watts backflow preventer - watts, in.

Watts backflow preventer - watts, in.

$239.95
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Watts m3 backflow - 1/2”, 9d-m3

Watts m3 backflow - 1/2”, 9d-m3

$97.97
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📊96 listings · from $7.99 · avg $193.38

Browse 96 backflow valve listings currently in our index. Prices range from $7.99 to $3359.99, with an average of $193.38. 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 $3359.99 — giving you a wide budget spread to work with. The average price of $193.38 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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