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Backflow preventer

4

Backflow preventer for sale on largest auction and classifieds sites

Home / Plumbing & Fixtures / Backflow preventer for sale – 96 used, around $170 | For Sale USA
350 double check backflow - double,

350 double check backflow - double,

$138.00
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Watts bronze reduced - in,

Watts bronze reduced - in,

$299.99
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Watts lf009 2 - 1/2, in

Watts lf009 2 - 1/2, in

$264.00
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Zurn wilkins 975xl rpz - zurn,

Zurn wilkins 975xl rpz - zurn,

$499.00
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Bbfp ips backflow - bbfp,,

Bbfp ips backflow - bbfp,,

$44.99
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Zurn wilkins 975xl2 1 - wilkins, 1-975xl2

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

$510.00
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Febco backflow lf850 qt - backflow, lf850-qt

Febco backflow lf850 qt - backflow, lf850-qt

$150.00
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Febco 20mm 765 - 20mm,

Febco 20mm 765 - 20mm,

$49.99
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Pvc backwater valve drain - backwater,

Pvc backwater valve drain - backwater,

$37.50
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Febco 765 pvb 1in - pvb,

Febco 765 pvb 1in - pvb,

$79.99
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Backflow preventer zurn - backflow,

Backflow preventer zurn - backflow,

$199.50
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Watts brass tubular - brass, #9d-m3

Watts brass tubular - brass, #9d-m3

$39.99
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Zurn wilkins 350xl - in.,

Zurn wilkins 350xl - in.,

$155.99
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Sandbaggy durable backflow - durable,

Sandbaggy durable backflow - durable,

$820.50
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Zurn wilkins 350 double - wilkins,

Zurn wilkins 350 double - wilkins,

$170.00
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Rpz backflow preventer - backflow,

Rpz backflow preventer - backflow,

$178.99
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350 double check - , 3/4"

350 double check - , 3/4"

$129.99
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Lot watts 8 back - 2,

Lot watts 8 back - 2,

$29.99
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Watts lf007m1 qt - watts, lf007m1-qt-fz

Watts lf007m1 qt - watts, lf007m1-qt-fz

$249.98
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Watts bronze quarter - 1,

Watts bronze quarter - 1,

$197.88
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Watts lf009m2 in - 1,

Watts lf009m2 in - 1,

$225.00
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Zurn wilkins 375 - wilkins,

Zurn wilkins 375 - wilkins,

$179.95
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975xl2 reduced - 3/4",

975xl2 reduced - 3/4",

$300.00
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Zurn wilkins 350 double - zurn,

Zurn wilkins 350 double - zurn,

$169.95
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Zurn wilkins 975xl2 - wilkins, 1-975xl2

Zurn wilkins 975xl2 - wilkins, 1-975xl2

$500.00
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Midwest instruments backflow - instruments,

Midwest instruments backflow - instruments,

$600.00
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Watts lf007m1 qt - watts, lf007m1-qt-fz

Watts lf007m1 qt - watts, lf007m1-qt-fz

$699.99
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350 double check backflow - double,

350 double check backflow - double,

$122.95
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Zurn wilkins 975xl2 2 - zurn,

Zurn wilkins 975xl2 2 - zurn,

$350.00
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Wilkins 975xl2 in rpz - wilkins,

Wilkins 975xl2 in rpz - wilkins,

$375.00
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Watts bronze quarter - watts,

Watts bronze quarter - watts,

$225.00
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Watts bronze double - watts, in.

Watts bronze double - watts, in.

$269.10
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720a pressure vacuum - 720a,

720a pressure vacuum - 720a,

$59.77
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Febco 1in bronze pressure - 1in.,

Febco 1in bronze pressure - 1in.,

$99.00
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Watts reduced pressure - reduced,

Watts reduced pressure - reduced,

$339.00
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Zurn wilkins 3 4 - wilkins, 3/4"

Zurn wilkins 3 4 - wilkins, 3/4"

$139.99
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Watts bronze reduced - watts,

Watts bronze reduced - watts,

$299.95
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Febco bronze pressure - febco,

Febco bronze pressure - febco,

$98.99
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Watts regulator 909agf - regulator,

Watts regulator 909agf - regulator,

$125.00
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Steel backflow preventer - steel,

Steel backflow preventer - steel,

$209.00
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Zurn wilkins 975xl2 - zurn, 2-975xl2

Zurn wilkins 975xl2 - zurn, 2-975xl2

$1079.99
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Adapters winterize blow out - to,

Adapters winterize blow out - to,

$11.99
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Febco in bronze - 3/4,

Febco in bronze - 3/4,

$79.99
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Backflow preventer insulation - backflow,

Backflow preventer insulation - backflow,

$31.99
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Zurn wilkins 950xlt2 - zurn,

Zurn wilkins 950xlt2 - zurn,

$199.80
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Zurn wilkins 375xl rp - 375xl, 3/4"

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

$279.99
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Pressure vacuum breaker - 3/4",

Pressure vacuum breaker - 3/4",

$55.00
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100 psi hose thread - hose, backflow

100 psi hose thread - hose, backflow

$6.99
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Wilkins 975xl2 in rpz - 3/4,

Wilkins 975xl2 in rpz - 3/4,

$399.99
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Watts double check valve - watts, 1

Watts double check valve - watts, 1

$179.99
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Watts lf009m2 s - 2, lf009m2-qt-s

Watts lf009m2 s - 2, lf009m2-qt-s

$1099.00
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Febco 1in bronze pressure - (2),

Febco 1in bronze pressure - (2),

$189.99
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Watts sd2 mf dual - watts, sd2-mf

Watts sd2 mf dual - watts, sd2-mf

$100.00
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Dema backflow preventer - 16-30,

Dema backflow preventer - 16-30,

$22.32
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Watts lead free double - watts,

Watts lead free double - watts,

$250.99
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Zurn wilkins 975xl2 - 975xl2, reduced

Zurn wilkins 975xl2 - 975xl2, reduced

$839.99
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Backflow preventer test - preventer,

Backflow preventer test - preventer,

$16.77
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Watts lf288a lead - watts, lead-free

Watts lf288a lead - watts, lead-free

$39.99
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Zurn wilkins 950xlt2 - wilkins, 3/4

Zurn wilkins 950xlt2 - wilkins, 3/4

$125.00
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Insulated well pump cover - well,

Insulated well pump cover - well,

$25.99
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Watts bronze double - watts,

Watts bronze double - watts,

$194.99
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Watts 719qt series 719 in - series,

Watts 719qt series 719 in - series,

$159.99
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350 double check - 3/4",

350 double check - 3/4",

$87.77
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Watts lf009m3 qt - watts, in

Watts lf009m3 qt - watts, in

$329.00
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Zurn wilkins backflow - zurn,

Zurn wilkins backflow - zurn,

$62.00
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Zurn wilkins 950xlt2 - zurn, 1

Zurn wilkins 950xlt2 - zurn, 1

$229.99
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Watts double check backflow - watts,

Watts double check backflow - watts,

$639.99
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Watts 009m2 backflow - watts, 2

Watts 009m2 backflow - watts, 2

$829.99
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Febco 765 in - 765-qt-fz, bronze

Febco 765 in - 765-qt-fz, bronze

$104.99
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Zurn wilkins inch - zurn, 950xlt2

Zurn wilkins inch - zurn, 950xlt2

$699.99
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975xl reduced - 975xl,

975xl reduced - 975xl,

$215.95
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Taco 3492 050 bt1 backflow - taco,

Taco 3492 050 bt1 backflow - taco,

$150.00
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Zurn wilkins 975xl2 reduced - zurn,

Zurn wilkins 975xl2 reduced - zurn,

$169.95
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Febco 765 pvb - 765-qt,

Febco 765 pvb - 765-qt,

$699.90
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Watts reduced pressure - 1",

Watts reduced pressure - 1",

$425.00
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Febco 1313 860 reduced - 860, 1"

Febco 1313 860 reduced - 860, 1"

$269.95
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High quality pack brass - high-quality, 2-pack

High quality pack brass - high-quality, 2-pack

$17.09
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Zurn wilkins double check - zurn,

Zurn wilkins double check - zurn,

$189.99
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Febco watts 765 pvb - pvb, 1"

Febco watts 765 pvb - pvb, 1"

$89.99
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Febco 765 qt pvb - pvb, watts

Febco 765 qt pvb - pvb, watts

$89.99
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350 backflow preventer - 34-350,

350 backflow preventer - 34-350,

$118.75
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Air compressor sae - air,

Air compressor sae - air,

$16.99
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Zurn wilkins 760 inch - zurn,

Zurn wilkins 760 inch - zurn,

$39.95
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Anderson brass abf 1fll asse - anderson, abf-1fll

Anderson brass abf 1fll asse - anderson, abf-1fll

$50.00
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Backflow preventer cover - preventer,

Backflow preventer cover - preventer,

$11.99
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Caleffi 573006a autofill - caleffi, combo

Caleffi 573006a autofill - caleffi, combo

$207.00
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Threaded backflow - (ips),

Threaded backflow - (ips),

$35.37
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Zurn wilkins 375astl - wilkins,

Zurn wilkins 375astl - wilkins,

$1249.00
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R620ct anti siphon backflow - r620ct,, anti-siphon

R620ct anti siphon backflow - r620ct,, anti-siphon

$19.99
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Watts 9dm2 backflow - in,

Watts 9dm2 backflow - in,

$65.00
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Hose bib backflow - 3/4",

Hose bib backflow - 3/4",

$61.30
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0887298 total repair kit - repair, for

0887298 total repair kit - repair, for

$49.00
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Hose bib backflow - hose,

Hose bib backflow - hose,

$62.33
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Dual check valve fip - 3/4",

Dual check valve fip - 3/4",

$16.99
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Backflow preventer security - backflow,

Backflow preventer security - backflow,

$350.00
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Febco 765 in pressure - 3/4,

Febco 765 in pressure - 3/4,

$89.99
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📊96 listings · from $6.99 · avg $237.19

Browse 96 backflow preventer listings currently in our index. Prices range from $6.99 to $1249, with an average of $237.19. 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 →

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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 $6.99, while premium listings can reach $1249 — giving you a wide budget spread to work with. The average price of $237.19 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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