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Backflow valve

4

Backflow valve for sale on largest auction and classifieds sites

Home / / Backflow valve refurbished & used for sale | For Sale USA
975xl2 reduced - 34-975xl2,

975xl2 reduced - 34-975xl2,

$280.25
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Watts double check - watts, 1”

Watts double check - watts, 1”

$157.98
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Febco 2812 860u union - febco,

Febco 2812 860u union - febco,

$389.00
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Watts bronze double - watts,

Watts bronze double - watts,

$189.99
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Watts b911s m3 - 1/2", b911s-m3

Watts b911s m3 - 1/2", b911s-m3

$169.99
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350 double check - double, backflow

350 double check - double, backflow

$138.00
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Brass dual check backflow - dual,

Brass dual check backflow - dual,

$38.41
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350 double check backflow - 1-350,

350 double check backflow - 1-350,

$135.00
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For pvb backflow preventer - backflow,

For pvb backflow preventer - backflow,

$75.90
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Rpz backflow preventer - rpz,

Rpz backflow preventer - rpz,

$150.00
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720a pressure vacuum - 3/4",

720a pressure vacuum - 3/4",

$60.17
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M3 backflow preventer - 9d-m3,

M3 backflow preventer - 9d-m3,

$26.95
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720a pressure vacuum - 1",

720a pressure vacuum - 1",

$66.00
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Apollo valves 4alf205a2f - apollo,

Apollo valves 4alf205a2f - apollo,

$494.99
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350 double check - double,

350 double check - double,

$169.99
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Zurn wilkins 350 double - wilkins, 1”

Zurn wilkins 350 double - wilkins, 1”

$200.00
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Reven 190t012 2 - 1/2, threaded

Reven 190t012 2 - 1/2, threaded

$40.50
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Watts bronze double - 3/4",

Watts bronze double - 3/4",

$100.00
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Backflow preventer valve 4 - preventer, valve,4

Backflow preventer valve 4 - preventer, valve,4

$79.86
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One uni lateral valve 4 - e-one, 1-1/4"

One uni lateral valve 4 - e-one, 1-1/4"

$424.58
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Pressure vacuum breaker - vacuum,

Pressure vacuum breaker - vacuum,

$60.00
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Watts bronze quarter turn - watts, 1”

Watts bronze quarter turn - watts, 1”

$179.99
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Zurn wilkins 975xl2 - zurn,

Zurn wilkins 975xl2 - zurn,

$325.00
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Zurn dual check valve - dual,

Zurn dual check valve - dual,

$35.99
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Brass backflow preventer - backflow, valve

Brass backflow preventer - backflow, valve

$23.99
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Complete repair kit - 3/4"-1",

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

$22.49
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Pvc white plastic solvent - plastic,

Pvc white plastic solvent - plastic,

$23.99
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Watts double check valve - 3/4",

Watts double check valve - 3/4",

$145.00
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009m3 qt backflow - 3/4",

009m3 qt backflow - 3/4",

$300.00
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Watts bronze quarter - watts, turn

Watts bronze quarter - watts, turn

$225.00
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Zurn wilkins 350 double - 3/4",

Zurn wilkins 350 double - 3/4",

$140.00
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Zurn wilkins 38ufx38f 700xl - zurn,

Zurn wilkins 38ufx38f 700xl - zurn,

$49.99
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Zurn wilkins double check - zurn,

Zurn wilkins double check - zurn,

$178.49
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Zurn wilkins 950xl double - 1”,

Zurn wilkins 950xl double - 1”,

$161.49
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Febco 1in bronze pressure - 1in.,

Febco 1in bronze pressure - 1in.,

$97.89
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Zurn 720a pressure - 3/4", 34-

Zurn 720a pressure - 3/4", 34-

$59.00
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Watts bronze quarter - in.,

Watts bronze quarter - in.,

$184.95
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Watts bronze double - in.,

Watts bronze double - in.,

$154.89
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Watts 007 double check - 007, 1"

Watts 007 double check - 007, 1"

$294.60
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Watts lfn9 lead free in - watts,

Watts lfn9 lead free in - watts,

$200.00
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Brass dual check backflow - check,

Brass dual check backflow - check,

$34.35
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Yahe 920d hvac backflow - 920d,

Yahe 920d hvac backflow - 920d,

$18.99
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Watts bronze double check - watts,

Watts bronze double check - watts,

$184.95
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Watts double check - watts,

Watts double check - watts,

$139.99
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Fip white plastic pvc - fip,

Fip white plastic pvc - fip,

$15.99
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Yahe 920d hvac backflow - 920d,

Yahe 920d hvac backflow - 920d,

$29.69
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Oatey pvc backwater - oatey, in.

Oatey pvc backwater - oatey, in.

$34.19
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Brass dual check valve - dual,

Brass dual check valve - dual,

$35.00
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Watts regulator 007 - watts, qt

Watts regulator 007 - watts, qt

$184.99
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Watts lead free - 3/4, in.

Watts lead free - 3/4, in.

$39.99
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Watts bronze quarter - watts, in.

Watts bronze quarter - watts, in.

$197.88
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Pack dn25 brass - 1",

Pack dn25 brass - 1",

$15.59
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Zurn wilkins 760 inch - zurn,

Zurn wilkins 760 inch - zurn,

$39.95
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Zurn wilkins 850 - wilkins, txl

Zurn wilkins 850 - wilkins, txl

$250.00
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New 375a zurn wilkins - 375a,

New 375a zurn wilkins - 375a,

$3779.99
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009 watts lf009 qt - watts, lf009-qt-fs

009 watts lf009 qt - watts, lf009-qt-fs

$235.00
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Backflow protector duckbill - protector,

Backflow protector duckbill - protector,

$18.15
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For watts 0061888 - watts,

For watts 0061888 - watts,

$69.50
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975xl2 reduced - 34-975xl2, 3/4"

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

$300.00
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Yahe hvac 920d inlet - yahe,

Yahe hvac 920d inlet - yahe,

$25.00
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Backflow preventer valve 4 - 4",

Backflow preventer valve 4 - 4",

$68.81
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Zurn wilkins 950xlt2 double - zurn,

Zurn wilkins 950xlt2 double - zurn,

$194.97
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Rpz watts lf009m3 4 - watts, r

Rpz watts lf009m3 4 - watts, r

$153.00
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Febco 1313 860 reduced - 1313, 1"

Febco 1313 860 reduced - 1313, 1"

$269.95
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720a pressure vacuum - 720a,

720a pressure vacuum - 720a,

$79.99
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Watts bronze quarter - in.,

Watts bronze quarter - in.,

$153.99
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Zurn wilkins 350xl - wilkins, in.

Zurn wilkins 350xl - wilkins, in.

$199.99
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Febco backflow lf850 qt - backflow, lf850-qt

Febco backflow lf850 qt - backflow, lf850-qt

$130.00
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Inch pvc backwater - 2,

Inch pvc backwater - 2,

$34.99
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Zurn wilkins 975xl2 reduced - zurn,

Zurn wilkins 975xl2 reduced - zurn,

$899.00
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New watts 4 bronze - (1),

New watts 4 bronze - (1),

$148.49
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Watts double check valve - watts,

Watts double check valve - watts,

$164.88
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Midline valve 4i2t112 pvc - 4i2t112,

Midline valve 4i2t112 pvc - 4i2t112,

$17.53
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Oatey pvc backwater - 4,

Oatey pvc backwater - 4,

$35.99
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Zurn wilkins 975xl2 4 - wilkins, 34-975xl2

Zurn wilkins 975xl2 4 - wilkins, 34-975xl2

$449.00
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For watts 0061888 - watts,

For watts 0061888 - watts,

$69.49
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White pvc backwater - white,

White pvc backwater - white,

$62.37
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350 double check - 1-350, backflow

350 double check - 1-350, backflow

$102.00
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Watts automatic fill valve and - watts,

Watts automatic fill valve and - watts,

$20.00
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Watts 007m3 qt - watts, 3/4"

Watts 007m3 qt - watts, 3/4"

$119.60
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Febco 1in bronze pressure - 1in.bronze,

Febco 1in bronze pressure - 1in.bronze,

$189.99
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Watts bronze double - in.,

Watts bronze double - in.,

$194.99
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Watts fpt lead free dual - watts,

Watts fpt lead free dual - watts,

$45.00
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Inch lead brass check - inch,

Inch lead brass check - inch,

$24.80
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Pcs 2 inch backwater - inch,

Pcs 2 inch backwater - inch,

$30.92
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720a pressure vacuum - pressure,

720a pressure vacuum - pressure,

$68.99
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For watts 4 bronze - 9d-m2, 3/4"

For watts 4 bronze - 9d-m2, 3/4"

$69.49
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Inch one way spring - 1,

Inch one way spring - 1,

$14.57
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Rk34 375 complete backflow - rk34-375,

Rk34 375 complete backflow - rk34-375,

$47.99
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Zurn wilkins 950xlt2 - zurn,

Zurn wilkins 950xlt2 - zurn,

$173.21
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Watts 3 stainless dual - 3/8",

Watts 3 stainless dual - 3/8",

$175.00
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Reliable inch pvc - 3-inch, backflow

Reliable inch pvc - 3-inch, backflow

$47.99
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Brass check valve backflow - check,

Brass check valve backflow - check,

$24.80
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Taco 334 boiler feed - taco,

Taco 334 boiler feed - taco,

$111.65
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Watts lf009m2 female - watts, rpz

Watts lf009m2 female - watts, rpz

$269.99
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Watts 009qt reduced - 1/2",

Watts 009qt reduced - 1/2",

$325.00
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📊96 listings · from $14.57 · avg $178

Browse 96 backflow valve listings currently in our index. Prices range from $14.57 to $3779.99, with an average of $178. 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 $14.57, while premium listings can reach $3779.99 — giving you a wide budget spread to work with. The average price of $178 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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