Skip to content
  • About
  • Contact Us
  • Shop
    • Backflow Repair Kits & Parts
    • Backflow Assemblies
    • Backflow Test Kits
    • Backflow Test Kit Accessories
    • Backflow Cages & Enclosures
    • Backflow Assembly Test Cocks
    • Backflow Air Gaps
  • Maintenance Sheets
  • Backflow Test Kit Calibration/Repair Services
  • Log in
  • Facebook
  • LinkedIn
  • YouTube
Cart
Backflow Supply Backflow Supply
  • About
  • Contact Us
  • Shop
    • Backflow Repair Kits & Parts
    • Backflow Assemblies
    • Backflow Test Kits
    • Backflow Test Kit Accessories
    • Backflow Cages & Enclosures
    • Backflow Assembly Test Cocks
    • Backflow Air Gaps
  • Maintenance Sheets
  • Backflow Test Kit Calibration/Repair Services
Log in Search Cart
Home / Products / 850
Cart
  • 850
  • Febco
  • 860
  • LF860
  • 850
  • LF850
  • 870
  • 880
  • 1/2"
  • 3/4"
  • 1"
  • 1 1/4"
  • 1 1/2"
  • 2"
  • 2 1/2"
  • 3"
  • 4"
  • 6"
  • 8"
  • 10"


Save $ 59.40
Quick Add
905142 SPR MOD. 850/870 2 1/2" - 3"
FEBCO
Regular price $ 198.00 Sale price $ 138.60
Save $ 78.30
Quick Add
905144 6" 850/860/870/880 SPRING
FEBCO
Regular price $ 261.00 Sale price $ 182.70
Save $ 88.80
Quick Add
905145 SPR MOD 850/860/870/880 8"
FEBCO
Regular price $ 296.00 Sale price $ 207.20
Save $ 60.60
Quick Add
905153 DISC ASSY 850/856/870/876 4"
FEBCO
Regular price $ 202.00 Sale price $ 141.40
Save $ 140.70
Quick Add
905155 DISC ASSY 8" 850/856/870/876
FEBCO
Regular price $ 469.00 Sale price $ 328.30
Save $ 161.25
Quick Add
905164 RUBBER KIT 850/856/870/876 6"
FEBCO
Regular price $ 537.50 Sale price $ 376.25
Save $ 350.40
Quick Add
905165 RUBBER 850/856/870/876 8"-10"
FEBCO
Regular price $ 1,168.00 Sale price $ 817.60
Save $ 60.60
Quick Add
905182 DISC ASSY 850/856/860 2.5"- 3"
FEBCO
Regular price $ 202.00 Sale price $ 141.40
Save $ 117.00
Quick Add
905249 RUBBER KIT 850/856 2 1/2" - 3"
FEBCO
Regular price $ 390.00 Sale price $ 273.00
Save $ 6.45
Quick Add
905339 POPPET ASSY 850/860 1/2"-3/4"
FEBCO
Regular price $ 21.50 Sale price $ 15.05
Save $ 6.90
Quick Add
905340 SINGLE POPPET KIT 850/860/880 1"
FEBCO
Regular price $ 23.00 Sale price $ 16.10
Save $ 9.30
Quick Add
905341 POPPET ASSY 850/860 11/4-2"
FEBCO
Regular price $ 31.00 Sale price $ 21.70
1 review
Save $ 5.62
Quick Add
905342 RUBBER KIT 850 1/2" - 3/4"
FEBCO
Regular price $ 18.75 Sale price $ 13.13
Save $ 6.45
Quick Add
905343 COMPLETE RUBBER 850 / LF850 1"
FEBCO
Regular price $ 21.50 Sale price $ 15.05
1 review
Save $ 11.40
Quick Add
905344 CHECK RUBBER KIT 1 1/4" - 2"
FEBCO
Regular price $ 38.00 Sale price $ 26.60
Save $ 18.15
Quick Add
905351 CK MOD.850/#2 860/880 1.25"-2"
FEBCO
Regular price $ 60.50 Sale price $ 42.35
Save $ 73.80
Quick Add
905467 LFRK 850/860/870/880 D 4"
FEBCO
Regular price $ 246.00 Sale price $ 172.20
Sold Out
905527 850/860 CK REPLACEMENT KIT 3"
FEBCO
Regular price $ 925.50 Sale price $ 647.85
Save $ 312.90
Quick Add
905534 850/860/870 CK REPLACEMENT 4"
FEBCO
Regular price $ 1,043.00 Sale price $ 730.10
Save $ 102.90
Quick Add
FEBC0 905158 SEAT RING ARM ASSY 4" 850/860/870/880
FEBCO
Regular price $ 343.00 Sale price $ 240.10
Quick Add
FEBCO 500392 CHECK RETAINER
FEBCO
$ 12.60
Save $ 63.30
Quick Add
Febco 6" Spring module DC 905472
FEBCO
Regular price $ 211.00 Sale price $ 147.70
Save $ 187.50
Quick Add
Febco 850-860 Seat Ring Arm Assembly 6" 905488
FEBCO
Regular price $ 625.00 Sale price $ 437.50
Sold Out
Febco 850/870 FRK 8"-10" CK4 905539
FEBCO
Regular price $ 1,743.00 Sale price $ 1,220.10
Save $ 65.10
Quick Add
Febco 905143 4" 850/860/870/880 SPRING
FEBCO
Regular price $ 217.00 Sale price $ 151.90
1 2 Next
905142 SPR MOD. 850/870 2 1/2" - 3"
FEBCO

905142 SPR MOD. 850/870 2 1/2" - 3"

Regular price $ 198.00 Sale price $ 138.60
3 in stock

SPRING MODULE FOR EITHER CHECK FOR THE MODELS 850 AND 870 2 1/2"-3".  AND THE #2 CHECK ONLY ON THE MODELS 860 AND 880.  

THESE DO NOT WORK IN THE "LF" (LEAD FREE) MODELS

905144  6" 850/860/870/880 SPRING
FEBCO

905144 6" 850/860/870/880 SPRING

Regular price $ 261.00 Sale price $ 182.70
1 in stock

PART# 905144  6" 850/860/870/880 SPRING

905145 SPR MOD 850/860/870/880 8"
FEBCO

905145 SPR MOD 850/860/870/880 8"

Regular price $ 296.00 Sale price $ 207.20
1 in stock

PART# 905145  SPR MOD 850/860/870/880 8"

905153 DISC ASSY 850/856/870/876 4"
FEBCO

905153 DISC ASSY 850/856/870/876 4"

Regular price $ 202.00 Sale price $ 141.40
2 in stock

Disc assembly for 850/856/870/876 4" assemblies. Comes with cover o-ring

905155 DISC ASSY 8" 850/856/870/876
FEBCO

905155 DISC ASSY 8" 850/856/870/876

Regular price $ 469.00 Sale price $ 328.30
1 in stock

CHECK DISC ASSY FOR EITHER CHECK 8" 850/856/870/876 

905164 RUBBER KIT 850/856/870/876 6"
FEBCO

905164 RUBBER KIT 850/856/870/876 6"

Regular price $ 537.50 Sale price $ 376.25
4 in stock

RUBBER KIT 850/856/870/876 6"  THIS KIT DOES NOT FIT THE LEAD FREE VERSIONS OF THESE MODELS THAT WOULD START WITH "LF"

905165 RUBBER 850/856/870/876 8"-10"
FEBCO

905165 RUBBER 850/856/870/876 8"-10"

Regular price $ 1,168.00 Sale price $ 817.60
1 in stock

CHECK RUBBER 850/856/870/876 8"-10".  IMAGE ONLY SHOWS ONE CHECK DISC BUT BOTH ARE IN THE KIT.


905182 DISC ASSY 850/856/860 2.5"-3"
FEBCO

905182 DISC ASSY 850/856/860 2.5"- 3"

Regular price $ 202.00 Sale price $ 141.40
1 in stock

CHECK DISC ASSEMBLY AND COVER O-RING FOR EITHER CHECK 850/856/860 2.5"-3"

905249 RUBBER KIT 850/856 2 1/2"- 3"
FEBCO

905249 RUBBER KIT 850/856 2 1/2" - 3"

Regular price $ 390.00 Sale price $ 273.00
3 in stock

RUBBER KIT FOR BOTH CHECKS  FOR MODELS 850/856 2 1/2"- 3" 

THIS KIT IS NOT FOR THE LEAD FREE (LF) MODELS.

905339 OPPET ASSY 850/860 1/2"-3/4"
FEBCO

905339 POPPET ASSY 850/860 1/2"-3/4"

Regular price $ 21.50 Sale price $ 15.05
0 in stock

PART# 905339† OPPET ASSY 850/860 1/2"-3/4"

905340 SNGL POPPET KIT 850/860/880 1"
FEBCO

905340 SINGLE POPPET KIT 850/860/880 1"

Regular price $ 23.00 Sale price $ 16.10
7 in stock

850/860/880 also fits lead free versions, LF850 and LF860 1" single poppet assembly for either check.

905341 POPPET ASSY 850/860 1 1/4"-2"
FEBCO

905341 POPPET ASSY 850/860 11/4-2"

1 review Regular price $ 31.00 Sale price $ 21.70
4 in stock

POPPET ASSEMBLY FOR  850/860 AND THE LEAD FREE VERSIONS, LF850/LF860 SIZES, 1 1/4", 1 1/2" AND 2"

905342 RUBBER KIT 850 1/2"-3/4"
FEBCO

905342 RUBBER KIT 850 1/2" - 3/4"

Regular price $ 18.75 Sale price $ 13.13
30 in stock

BOTH CHECKS, RUBBER KIT FOR MODELS 850 OR LF850 AND THE 860/LF860 1/2" AND 3/4" SIZES

905343 COMPLETE RUBBER 850 1"
FEBCO

905343 COMPLETE RUBBER 850 / LF850 1"

1 review Regular price $ 21.50 Sale price $ 15.05
21 in stock

850/LF850 1" check rubber kit for both checks. Can also be used for the 860/LF860 1" checks.

905344 RUBBER KIT 850 1 1/4"-2"
FEBCO

905344 CHECK RUBBER KIT 1 1/4" - 2"

Regular price $ 38.00 Sale price $ 26.60
22 in stock

RUBBER KIT FOR BOTH CHECKS FOR MODELS 850, LF850, 860 OR LF860 1 1/4"-2"

905351 CK MOD.850/#2 860/880 1.25"-2"
FEBCO

905351 CK MOD.850/#2 860/880 1.25"-2"

Regular price $ 60.50 Sale price $ 42.35
31 in stock

CK MODULE FOR EITHER THE #1 OR #2 FOR MODELS 850/LF850 AND 850U/LF850U AND ONLY THE #2 CHECK FOR MODELS  860/LF860/880.  SIZES 1.25"-2"

905467  LFRK 850/860/870/880 D 4"
FEBCO

905467 LFRK 850/860/870/880 D 4"

Regular price $ 246.00 Sale price $ 172.20
1 in stock

PART# 905467  LFRK 850/860/870/880 D 4"

905534 850/860/870 CK REPLACEMENT 4"
FEBCO

905534 850/860/870 CK REPLACEMENT 4"

Regular price $ 1,043.00 Sale price $ 730.10
1 in stock

PART# 905534 850/860/870 CK REPLACEMENT 4". 850/870 4" COMPLET CHECK ASSEMBLY FOR EITHER #1 OR #2 CHECKS. ALSO FOR #2CHECK ON THE 860.

905158 SEAT RING ARM ASSY 4" 850/860/870/880
FEBCO

FEBC0 905158 SEAT RING ARM ASSY 4" 850/860/870/880

Regular price $ 343.00 Sale price $ 240.10
3 in stock

Seat ring arm assembly for 4" 850/860/870/880 for either #1 or #2 check.

 

FEBCO 500392 CHECK RETAINER
FEBCO 500392 CHECK RETAINER
FEBCO 500392 CHECK RETAINER
FEBCO 500392 CHECK RETAINER
FEBCO 500392 CHECK RETAINER
FEBCO 500392 CHECK RETAINER
FEBCO

FEBCO 500392 CHECK RETAINER

Regular price $ 12.60
4 in stock

FEBCO RETAINER SPACER FOR 1/2" AND 3/4" MODELS 850/860/LF850/LF860.  THIS IS THE PIECE THAT SITS BETWEEN THE TWO CHECKS AND HOLDS THEM IN PLACE IN THE BODY.
Febco 6"  Spring module DC 905472
FEBCO

Febco 6" Spring module DC 905472

Regular price $ 211.00 Sale price $ 147.70
0 in stock

Febco 6" LF850, LF870 Double Check lead free spring module repair kit for first or second check .

And the LF860, LF880 Reduced Pressure lead free spring module repair kit for the  second check.

Kit includes spring module with a cover o-ring. Ordering # 905472

Febco 850-860 Seat Ring Arm Assembly 6" 905488
FEBCO

Febco 850-860 Seat Ring Arm Assembly 6" 905488

Regular price $ 625.00 Sale price $ 437.50
0 in stock

Febco 6" 850-860 seat ring arm assembly. Ordering # 905488

Picture is of the one used in the lead free models.  The parts are similar only made out of brass in the non lead free models.

 

905143 4" 850/860/870/880 SPRING
FEBCO

Febco 905143 4" 850/860/870/880 SPRING

Regular price $ 217.00 Sale price $ 151.90
3 in stock

Febco 4" 850/860/870/880 Replacement Spring. It is either for #1 or #2 spring for the 850/870 and only the #2 spring for the 860/880.

Backflow Supply
  • Facebook
  • LinkedIn
  • YouTube

Powered by Shopify

More Resources

  • BackFlow Resources
  • Request A Quote
  • Place an Order
  • Contact
Backflow Supply
  • Facebook
  • LinkedIn
  • YouTube

Powered by Shopify

  • American Express
  • Apple Pay
  • Discover
  • Meta Pay
  • Google Pay
  • Mastercard
  • PayPal
  • Venmo
  • Visa