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Backflow preventer

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Backflow preventer for sale on largest auction and classifieds sites

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Watts bronze double check - double,

Watts bronze double check - double,

$115.00
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Watts lf009 2 in - watts, 1/2

Watts lf009 2 in - watts, 1/2

$260.00
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Watts b911t in - 1/2,

Watts b911t in - 1/2,

$180.00
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Swagelok 12c 4 od - ss-12c-1,,

Swagelok 12c 4 od - ss-12c-1,,

$220.00
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350 double check backflow - check,

350 double check backflow - check,

$138.00
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Watts b911t m3 - 1/2, backflow

Watts b911t m3 - 1/2, backflow

$130.00
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Wilkins 975xl2 in - 34-975xl2,

Wilkins 975xl2 in - 34-975xl2,

$399.99
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Steel high capacity - high, 1/2"

Steel high capacity - high, 1/2"

$26.99
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350 backflow preventer - 34-350,

350 backflow preventer - 34-350,

$125.00
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Zurn wilkins 375 rpz - wilkins, backflow

Zurn wilkins 375 rpz - wilkins, backflow

$149.95
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Zurn wilkins 975xl2 1 - zurn, 1-975xl2

Zurn wilkins 975xl2 1 - zurn, 1-975xl2

$510.00
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Watts double check valve - watts, 3/4"

Watts double check valve - watts, 3/4"

$153.00
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Watts lead free - 3/4, in.

Watts lead free - 3/4, in.

$39.69
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Wilkins 375xl rpz - 375xl, 1

Wilkins 375xl rpz - 375xl, 1

$250.50
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Zurn 975xl wilkins - zurn,

Zurn 975xl wilkins - zurn,

$439.20
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Watts lfusg in manual - in,

Watts lfusg in manual - in,

$100.00
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Watts bronze quarter - 1,

Watts bronze quarter - 1,

$197.88
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Watts regulator 909agf - regulator, ~909agf

Watts regulator 909agf - regulator, ~909agf

$99.00
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975xl2 reduced - 34-975xl2,

975xl2 reduced - 34-975xl2,

$300.00
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Wilkins 375xl - wilkins,

Wilkins 375xl - wilkins,

$320.00
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Watts bbfp atmospheric - watts,

Watts bbfp atmospheric - watts,

$47.49
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Watts lead free double check - free,

Watts lead free double check - free,

$39.95
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Taco 334 boiler feed - 334-t3,

Taco 334 boiler feed - 334-t3,

$97.99
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Febco 765 pvb - febco, 765-qt

Febco 765 pvb - febco, 765-qt

$399.99
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Zurn wilkins 350xl - zurn, 3/4

Zurn wilkins 350xl - zurn, 3/4

$156.99
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New watts 007m1 double - watts,

New watts 007m1 double - watts,

$139.95
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Febco 765 4 - febco,

Febco 765 4 - febco,

$74.99
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Watts bronze reduced - watts, 1

Watts bronze reduced - watts, 1

$299.99
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Zurn wilkins 350 - wilkins, double

Zurn wilkins 350 - wilkins, double

$170.00
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Watts lf009m3 4 - watts, in

Watts lf009m3 4 - watts, in

$312.50
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Wilkins 975xl2 in rpz - in,

Wilkins 975xl2 in rpz - in,

$375.00
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Watts bronze quarter turn - watts, 1”

Watts bronze quarter turn - watts, 1”

$225.00
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Backflow preventer test - preventer, cock

Backflow preventer test - preventer, cock

$16.77
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Dual check valve - dual, fip

Dual check valve - dual, fip

$16.99
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Backflow preventer ames - preventer,

Backflow preventer ames - preventer,

$600.00
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Watts backflow preventer - 1,

Watts backflow preventer - 1,

$159.95
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Febco 860 rp reduced - febco, 1"

Febco 860 rp reduced - febco, 1"

$362.65
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Zurn wilkins 2in 975xl2 - wilkins,

Zurn wilkins 2in 975xl2 - wilkins,

$375.00
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350 double check - 350,

350 double check - 350,

$100.00
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Watts lf009m3 4 in rpz - in,

Watts lf009m3 4 in rpz - in,

$310.00
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Backflow preventer wilkins - preventer,

Backflow preventer wilkins - preventer,

$6.29
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Watts lf288a lead free - lf288a, lead-free

Watts lf288a lead free - lf288a, lead-free

$39.99
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Febco bronze pressure - febco, 3/4”bronze

Febco bronze pressure - febco, 3/4”bronze

$88.99
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Zurn wilkins 950xlt2 double - zurn,

Zurn wilkins 950xlt2 double - zurn,

$194.97
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Zurn wilkins 975xl2 - 1-975xl2, 1"

Zurn wilkins 975xl2 - 1-975xl2, 1"

$490.00
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Carbonated beverage backflow - beverage,

Carbonated beverage backflow - beverage,

$100.00
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Zurn wilkins 350 - zurn, 1-350

Zurn wilkins 350 - zurn, 1-350

$159.00
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Zurn wilkins 975xl2 4 - zurn, 34-975xl2

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

$500.00
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Zurn wilkins 2in 975xl2 - 2in,

Zurn wilkins 2in 975xl2 - 2in,

$900.00
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Watts backflow preventer - watts,

Watts backflow preventer - watts,

$175.00
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Watts 9d m3 - 9d-m3,

Watts 9d m3 - 9d-m3,

$49.87
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Apollo 4a505a2f pvb4a - 4a505a2f,

Apollo 4a505a2f pvb4a - 4a505a2f,

$164.98
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Zurn 950xl double - (2, in)

Zurn 950xl double - (2, in)

$710.00
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Febco 765 4 in pvb - 765-qt-fz, 3/4

Febco 765 4 in pvb - 765-qt-fz, 3/4

$88.00
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Febco 860 qt rp - febco, 860-qt-rp-fs

Febco 860 qt rp - febco, 860-qt-rp-fs

$279.01
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Zurn wilkins 350 double - wilkins, 1”

Zurn wilkins 350 double - wilkins, 1”

$169.95
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Febco 765 bv pressure - 765-3/4,

Febco 765 bv pressure - 765-3/4,

$85.00
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Zurn wilkins 975xl - zurn,

Zurn wilkins 975xl - zurn,

$369.00
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Fip 1 series dual - fip, bf-1

Fip 1 series dual - fip, bf-1

$48.49
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Watts bronze double - watts,

Watts bronze double - watts,

$194.99
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Febco bronze pressure - in,

Febco bronze pressure - in,

$76.99
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Zurn wilkins 950xlt2 - zurn,

Zurn wilkins 950xlt2 - zurn,

$229.99
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Watts 88006822 backflow - 88006822,

Watts 88006822 backflow - 88006822,

$79.98
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Febco 1in bronze pressure - 1in.,

Febco 1in bronze pressure - 1in.,

$84.99
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Durable pack brass hose bibb - 2,

Durable pack brass hose bibb - 2,

$16.14
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Febco 1in bronze pressure - (2),

Febco 1in bronze pressure - (2),

$189.99
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Backflow preventer zurn - backflow,

Backflow preventer zurn - backflow,

$199.50
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Watts reduced pressure - 3/4",

Watts reduced pressure - 3/4",

$279.00
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Zurn wilkins 12 - 3),

Zurn wilkins 12 - 3),

$119.99
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Zurn wilkins 950xlt2 - wilkins,

Zurn wilkins 950xlt2 - wilkins,

$225.00
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Zurn wilkins double - wilkins,

Zurn wilkins double - wilkins,

$315.00
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Backflow preventer cover - backflow,

Backflow preventer cover - backflow,

$11.99
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Zurn wilkins 975xl 4 - zurn, 34-975xl

Zurn wilkins 975xl 4 - zurn, 34-975xl

$349.99
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Watts double check valve - double,

Watts double check valve - double,

$164.88
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Backflow preventer pressure - 1",

Backflow preventer pressure - 1",

$51.00
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Watts regulator backflow - watts,

Watts regulator backflow - watts,

$224.99
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Zurn wilkins 975xl - zurn,

Zurn wilkins 975xl - zurn,

$459.99
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Watts lf009m3 rpz - watts, 3/4"

Watts lf009m3 rpz - watts, 3/4"

$250.00
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Febco bronze pressure - febco, in.

Febco bronze pressure - febco, in.

$84.99
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Niiiytyb 2pcs drain backflow - niiiytyb,

Niiiytyb 2pcs drain backflow - niiiytyb,

$16.11
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Zurn wilkins 375 rp - 1",

Zurn wilkins 375 rp - 1",

$250.00
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Watts 719qt series - watts, double

Watts 719qt series - watts, double

$99.99
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Zurn wilkins double - zurn, check

Zurn wilkins double - zurn, check

$199.99
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Zurn wilkins 375xl rp - zurn, 3/4"

Zurn wilkins 375xl rp - zurn, 3/4"

$279.99
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Febco 850 dc - febco, 1"

Febco 850 dc - febco, 1"

$244.35
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Febco 860 3 - 860-qt-rp-fs, 3/4"

Febco 860 3 - 860-qt-rp-fs, 3/4"

$319.99
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Febco 860 f1313 - f1313, rpz

Febco 860 f1313 - f1313, rpz

$449.99
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Zurn wilkins 350xl - wilkins, 3/4”

Zurn wilkins 350xl - wilkins, 3/4”

$148.00
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Taco 3492 050 - taco, backflow

Taco 3492 050 - taco, backflow

$150.00
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Backflow preventer repair kit - preventer,

Backflow preventer repair kit - preventer,

$23.99
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Zurn wilkins 4 air gap - zurn,, ag-4

Zurn wilkins 4 air gap - zurn,, ag-4

$45.00
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Zurn wilkins in 350xl - zurn, 3/4

Zurn wilkins in 350xl - zurn, 3/4

$199.00
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Watts 9bd backflow - m1,

Watts 9bd backflow - m1,

$250.00
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Febco 1in bronze pressure - febco, 1in.

Febco 1in bronze pressure - febco, 1in.

$99.99
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Watts bronze quarter - 1, in.

Watts bronze quarter - 1, in.

$199.00
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Watts lf007m1 fz rpz - watts, 1"

Watts lf007m1 fz rpz - watts, 1"

$286.00
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📊96 listings · from $6.29 · avg $207.55

Browse 96 backflow preventer listings currently in our index. Prices range from $6.29 to $900, with an average of $207.55. 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 preventer →

Try this: watts 009 | hand wash sink | hand washing sink | mop sink | vintage glass towel rod | portable 3 compartment sink | american standard pink toilet | 427 sohc | ridgid 1224 | rex pipe threader

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Everything you need to know about backflow preventer

Whether you are looking for a brand-new or second-hand backflow preventer, 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 $6.29, while premium listings can reach $900 — giving you a wide budget spread to work with. The average price of $207.55 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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