Skip to accessibility statement
Free shipping on orders over $99
●
Your Zip:
43230
ORDER STATUS
Your Zip:
43230
HELP
MENU
CONTACT & SUPPORT
Live Chat: Online Now
SIGN IN
0
CART
×
SIGN IN
Shop by Category
Plumbing
Heating
HVAC
Electrical
PEX
Fittings
Valves
Tools
Resources
Our Team
Account
Order History
Returns
Customer Support
Give Us Feedback
Tools
Reorder
Quick Order
Saved Carts
Lists
Resources
PEX Plumbing
PEX Tools
Radiant Heat
Boiler Room
Plumbing Supplies
Air Conditioning
Video Library
Project Calculators
Find Parts For Your Unit
Filter menu expanded
Filters
Hide Filters
221 items
Reset
SORT
Top Sellers
Default
Price ▲
Price ▼
Product Availability
–
Show In Stock Only</strong> Filter (205)
Show
In Stock Only
(205)
Connection Size
–
1/2" Filter (2)
1/2" (2)
3/4" Filter (53)
3/4" (53)
1" Filter (56)
1" (56)
1-1/4" Filter (46)
1-1/4" (46)
1-1/2" Filter (41)
1-1/2" (41)
2" Filter (24)
2" (24)
Connection Type
–
PEX Crimp Filter (8)
PEX Crimp (8)
PP-R Filter (1)
PP-R (1)
Press Filter (43)
Press (43)
ProPEX Filter (8)
ProPEX (8)
Sweat Filter (76)
Sweat (76)
Threaded Filter (74)
Threaded (74)
Review Score
–
5 Filter (70)
(70)
4 Filter (5)
(5)
3 Filter (1)
(1)
1 Filter (1)
(1)
Price Range
–
Under $1 Filter (1)
Under $1 (1)
$1 to $5 Filter (1)
$1 to $5 (1)
$15 to $20 Filter (4)
$15 to $20 (4)
$25 to $30 Filter (3)
$25 to $30 (3)
$30 to $35 Filter (1)
$30 to $35 (1)
$40 to $45 Filter (7)
$40 to $45 (7)
$45 to $50 Filter (10)
$45 to $50 (10)
$50 to $60 Filter (11)
$50 to $60 (11)
$60 to $70 Filter (22)
$60 to $70 (22)
$70 to $80 Filter (20)
$70 to $80 (20)
See More
Home
Heating Supplies & Parts
Circulator Pumps
Pump Flanges
Isolation Valve Flanges
Webstone Isolation Valve Flanges
Webstone Isolation Valve Flanges
Need a little help?
View our Resources
221 items
FILTER
Grid
List
Sort: Default
40402 Compare Checkbox
Compare
1/2" Threaded Isolator Flange
SKU:
40402
Webstone
SKU:
40402
Brand:
Webstone
(32)
–
+
$49.87
each
ADD TO CART
Add to List
In Stock
Get 5 by
Tue, Jun 9
Total Available: 258
In Stock
Get 5 by
Tue, Jun 9
Total Available: 258
Add to List
40403 Compare Checkbox
Compare
3/4" Threaded Isolator Flange
SKU:
40403
Webstone
SKU:
40403
Brand:
Webstone
(32)
–
+
$41.32
each
ADD TO CART
Add to List
In Stock
Get 57 by
Tomorrow, Jun 5
Total Available: 690
In Stock
Get 57 by
Tomorrow, Jun 5
Total Available: 690
Add to List
40404 Compare Checkbox
Compare
1" Threaded Isolator Flange
SKU:
40404
Webstone
SKU:
40404
Brand:
Webstone
(32)
–
+
$49.65
each
ADD TO CART
Add to List
In Stock
Get 38 by
Tomorrow, Jun 5
Total Available: 644
In Stock
Get 38 by
Tomorrow, Jun 5
Total Available: 644
Add to List
H-40405 Compare Checkbox
Compare
1-1/4" Threaded Isolator Flange
SKU:
H-40405
Webstone
SKU:
H-40405
Brand:
Webstone
(32)
–
+
$62.04
each
ADD TO CART
Add to List
In Stock
Get 46 by
Tomorrow, Jun 5
Total Available: 604
In Stock
Get 46 by
Tomorrow, Jun 5
Total Available: 604
Add to List
40406 Compare Checkbox
Compare
1-1/2" Threaded Isolator Flange
SKU:
40406
Webstone
SKU:
40406
Brand:
Webstone
(32)
–
+
$77.56
each
ADD TO CART
Add to List
In Stock
Get 9 by
Tomorrow, Jun 5
Total Available: 537
In Stock
Get 9 by
Tomorrow, Jun 5
Total Available: 537
Add to List
40404HV Compare Checkbox
Compare
1" Threaded Isolator - High Velocity
SKU:
40404HV
Webstone
SKU:
40404HV
Brand:
Webstone
–
+
$68.41
each
ADD TO CART
Add to List
In Stock
Get 7 by
Tomorrow, Jun 5
Total Available: 517
In Stock
Get 7 by
Tomorrow, Jun 5
Total Available: 517
Add to List
40405HV Compare Checkbox
Compare
1-1/4" Threaded Isolator - High Velocity
SKU:
40405HV
Webstone
SKU:
40405HV
Brand:
Webstone
(1)
–
+
$61.63
each
ADD TO CART
Add to List
In Stock
Get 5 by
Tue, Jun 9
Total Available: 152
In Stock
Get 5 by
Tue, Jun 9
Total Available: 152
Add to List
40406HV Compare Checkbox
Compare
1-1/2" Threaded Isolator - High Velocity
SKU:
40406HV
Webstone
SKU:
40406HV
Brand:
Webstone
(1)
–
+
$88.61
each
ADD TO CART
Add to List
In Stock
Get 298 by
Tue, Jun 9 - Wed, Jun 10
In Stock
Get 298 by
Tue, Jun 9 - Wed, Jun 10
Add to List
40407HV Compare Checkbox
Compare
2" Threaded Isolator - High Velocity
SKU:
40407HV
Webstone
SKU:
40407HV
Brand:
Webstone
–
+
$116.34
each
ADD TO CART
Add to List
In Stock
Get 7 by
Tomorrow, Jun 5
Total Available: 525
In Stock
Get 7 by
Tomorrow, Jun 5
Total Available: 525
Add to List
50402 Compare Checkbox
Compare
1/2" Sweat Isolator Flange
SKU:
50402
Webstone
SKU:
50402
Brand:
Webstone
(17)
–
+
$45.20
each
ADD TO CART
Add to List
In Stock
Get 4 by
Tomorrow, Jun 5
Total Available: 99
In Stock
Get 4 by
Tomorrow, Jun 5
Total Available: 99
Add to List
50403 Compare Checkbox
Compare
3/4" Sweat Isolator Flange
SKU:
50403
Webstone
SKU:
50403
Brand:
Webstone
(17)
–
+
$41.37
each
ADD TO CART
Add to List
In Stock
Get 100 by
Tomorrow, Jun 5
Total Available: 709
In Stock
Get 100 by
Tomorrow, Jun 5
Total Available: 709
Add to List
50404 Compare Checkbox
Compare
1" Sweat Isolator Flange
SKU:
50404
Webstone
SKU:
50404
Brand:
Webstone
(17)
–
+
$49.59
each
ADD TO CART
Add to List
In Stock
Get 76 by
Tomorrow, Jun 5
Total Available: 690
In Stock
Get 76 by
Tomorrow, Jun 5
Total Available: 690
Add to List
50405 Compare Checkbox
Compare
1-1/4" Sweat Isolator Flange
SKU:
50405
Webstone
SKU:
50405
Brand:
Webstone
(17)
–
+
$62.04
each
ADD TO CART
Add to List
In Stock
Get 18 by
Tomorrow, Jun 5
Total Available: 579
In Stock
Get 18 by
Tomorrow, Jun 5
Total Available: 579
Add to List
50406 Compare Checkbox
Compare
1-1/2" Sweat Isolator Flange
SKU:
50406
Webstone
SKU:
50406
Brand:
Webstone
(17)
–
+
$85.21
each
ADD TO CART
Add to List
In Stock
Get 8 by
Tomorrow, Jun 5
Total Available: 526
In Stock
Get 8 by
Tomorrow, Jun 5
Total Available: 526
Add to List
50404HV Compare Checkbox
Compare
1" Sweat Isolator Flange - High Velocity
SKU:
50404HV
Webstone
SKU:
50404HV
Brand:
Webstone
–
+
$50.50
each
ADD TO CART
Add to List
In Stock
Get 4 by
Tomorrow, Jun 5
Total Available: 515
In Stock
Get 4 by
Tomorrow, Jun 5
Total Available: 515
Add to List
50405HV Compare Checkbox
Compare
1-1/4" Sweat Isolator Flange - High Velocity
SKU:
50405HV
Webstone
SKU:
50405HV
Brand:
Webstone
(2)
–
+
$66.22
each
ADD TO CART
Add to List
In Stock
Get 4 by
Tomorrow, Jun 5
Total Available: 457
In Stock
Get 4 by
Tomorrow, Jun 5
Total Available: 457
Add to List
50406HV Compare Checkbox
Compare
1-1/2" Sweat Isolator Flange - High Velocity
SKU:
50406HV
Webstone
SKU:
50406HV
Brand:
Webstone
–
+
$83.48
each
ADD TO CART
Add to List
In Stock
Get 7 by
Tomorrow, Jun 5
Total Available: 458
In Stock
Get 7 by
Tomorrow, Jun 5
Total Available: 458
Add to List
50407HV Compare Checkbox
Compare
2" Sweat Isolator Flange - High Velocity
SKU:
50407HV
Webstone
SKU:
50407HV
Brand:
Webstone
–
+
$111.30
each
ADD TO CART
Add to List
In Stock
Get 15 by
Tomorrow, Jun 5
Total Available: 366
In Stock
Get 15 by
Tomorrow, Jun 5
Total Available: 366
Add to List
40413 Compare Checkbox
Compare
3/4" Threaded Isolator Flange with Drain
SKU:
40413
Webstone
SKU:
40413
Brand:
Webstone
(14)
–
+
$56.13
each
ADD TO CART
Add to List
In Stock
Get 20 by
Tomorrow, Jun 5
Total Available: 542
In Stock
Get 20 by
Tomorrow, Jun 5
Total Available: 542
Add to List
40414 Compare Checkbox
Compare
1" Threaded Isolator Flange with Drain
SKU:
40414
Webstone
SKU:
40414
Brand:
Webstone
(14)
–
+
$70.66
each
ADD TO CART
Add to List
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 281
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 281
Add to List
40415 Compare Checkbox
Compare
1-1/4" Threaded Isolator Flange with Drain
SKU:
40415
Webstone
SKU:
40415
Brand:
Webstone
(14)
–
+
$116.17
each
ADD TO CART
Add to List
In Stock
Get 24 by
Tue, Jun 9 - Wed, Jun 10
Total Available: 28
In Stock
Get 24 by
Tue, Jun 9 - Wed, Jun 10
Total Available: 28
Add to List
40416 Compare Checkbox
Compare
1-1/2" Threaded Isolator Flange with Drain
SKU:
40416
Webstone
SKU:
40416
Brand:
Webstone
(14)
–
+
$130.71
each
ADD TO CART
Add to List
In Stock
Get 5 by
Tomorrow, Jun 5
Total Available: 172
In Stock
Get 5 by
Tomorrow, Jun 5
Total Available: 172
Add to List
40414HV Compare Checkbox
Compare
1" Threaded Isolator with Drain - High Velocity
SKU:
40414HV
Webstone
SKU:
40414HV
Brand:
Webstone
–
+
$85.38
each
ADD TO CART
Add to List
In Stock
Get 3 by
Tomorrow, Jun 5
Total Available: 120
In Stock
Get 3 by
Tomorrow, Jun 5
Total Available: 120
Add to List
40415HV Compare Checkbox
Compare
1-1/4" Threaded Isolator with Drain - High Velocity
SKU:
40415HV
Webstone
SKU:
40415HV
Brand:
Webstone
–
+
$110.40
each
ADD TO CART
Add to List
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 144
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 144
Add to List
40416HV Compare Checkbox
Compare
1-1/2" Threaded Isolator with Drain - High Velocity
SKU:
40416HV
Webstone
SKU:
40416HV
Brand:
Webstone
–
+
$122.20
each
ADD TO CART
Add to List
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 137
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 137
Add to List
40417HV Compare Checkbox
Compare
2" Threaded Isolator with Drain - High Velocity
SKU:
40417HV
Webstone
SKU:
40417HV
Brand:
Webstone
–
+
$191.16
each
ADD TO CART
Add to List
In Stock
Get 50 by
Tue, Jun 9 - Wed, Jun 10
In Stock
Get 50 by
Tue, Jun 9 - Wed, Jun 10
Add to List
40413KIT Compare Checkbox
Compare
3/4" IPS x Flange Isolator Circulator Pump Install Kit
SKU:
40413KIT
Webstone
SKU:
40413KIT
Brand:
Webstone
(4)
–
+
$106.86
each
ADD TO CART
Add to List
In Stock
Get 3 by
Tomorrow, Jun 5
Total Available: 57
In Stock
Get 3 by
Tomorrow, Jun 5
Total Available: 57
Add to List
40414KIT Compare Checkbox
Compare
1" IPS x Flange Isolator Circulator Pump Install Kit
SKU:
40414KIT
Webstone
SKU:
40414KIT
Brand:
Webstone
(2)
–
+
$130.15
each
ADD TO CART
Add to List
In Stock
Get 3 by
Tomorrow, Jun 5
Total Available: 104
In Stock
Get 3 by
Tomorrow, Jun 5
Total Available: 104
Add to List
40415KIT Compare Checkbox
Compare
1-1/4" IPS x Flange Isolator Circulator Pump Install Kit
SKU:
40415KIT
Webstone
SKU:
40415KIT
Brand:
Webstone
(1)
–
+
$162.37
each
ADD TO CART
Add to List
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 78
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 78
Add to List
40414HVKIT Compare Checkbox
Compare
1" Threaded Isolator Circulator Pump Install Kit (High Velocity)
SKU:
40414HVKIT
Webstone
SKU:
40414HVKIT
Brand:
Webstone
–
+
$121.88
each
ADD TO CART
Add to List
In Stock
Get 1 by
Tue, Jun 9 - Wed, Jun 10
In Stock
Get 1 by
Tue, Jun 9 - Wed, Jun 10
Add to List
40415HVKIT Compare Checkbox
Compare
1-1/4" Threaded Isolator Circulator Pump Install Kit (High Velocity)
SKU:
40415HVKIT
Webstone
SKU:
40415HVKIT
Brand:
Webstone
–
+
$151.94
each
ADD TO CART
Add to List
In Stock
Get 1 by
Tue, Jun 9 - Wed, Jun 10
In Stock
Get 1 by
Tue, Jun 9 - Wed, Jun 10
Add to List
50413 Compare Checkbox
Compare
3/4" Sweat Isolator Flange with Drain
SKU:
50413
Webstone
SKU:
50413
Brand:
Webstone
(7)
–
+
$57.92
each
ADD TO CART
Add to List
In Stock
Get 20 by
Tomorrow, Jun 5
Total Available: 581
In Stock
Get 20 by
Tomorrow, Jun 5
Total Available: 581
Add to List
50414 Compare Checkbox
Compare
1" Sweat Isolator Flange with Drain
SKU:
50414
Webstone
SKU:
50414
Brand:
Webstone
(7)
–
+
$70.66
each
ADD TO CART
Add to List
In Stock
Get 24 by
Tomorrow, Jun 5
Total Available: 544
In Stock
Get 24 by
Tomorrow, Jun 5
Total Available: 544
Add to List
50415 Compare Checkbox
Compare
1-1/4" Sweat Isolator Flange with Drain
SKU:
50415
Webstone
SKU:
50415
Brand:
Webstone
(7)
–
+
$103.78
each
ADD TO CART
Add to List
In Stock
Get 11 by
Tomorrow, Jun 5
Total Available: 545
In Stock
Get 11 by
Tomorrow, Jun 5
Total Available: 545
Add to List
50416 Compare Checkbox
Compare
1-1/2" Sweat Isolator Flange with Drain
SKU:
50416
Webstone
SKU:
50416
Brand:
Webstone
(7)
–
+
$145.48
each
ADD TO CART
Add to List
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 411
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 411
Add to List
50414HV Compare Checkbox
Compare
1" Sweat Isolator w/ Drain - High Velocity
SKU:
50414HV
Webstone
SKU:
50414HV
Brand:
Webstone
–
+
$94.57
each
ADD TO CART
Add to List
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 506
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 506
Add to List
50415HV Compare Checkbox
Compare
1-1/4" Sweat Isolator w/ Drain - High Velocity
SKU:
50415HV
Webstone
SKU:
50415HV
Brand:
Webstone
(1)
–
+
$135.44
each
ADD TO CART
Add to List
In Stock
Get 283 by
Tue, Jun 9 - Wed, Jun 10
In Stock
Get 283 by
Tue, Jun 9 - Wed, Jun 10
Add to List
50413HV Compare Checkbox
Compare
3/4" Sweat Isolator w/ Drain - High Velocity
SKU:
50413HV
Webstone
SKU:
50413HV
Brand:
Webstone
–
+
$84.63
each
ADD TO CART
Add to List
In Stock
Get 2 by
Tomorrow, Jun 5
Total Available: 149
In Stock
Get 2 by
Tomorrow, Jun 5
Total Available: 149
Add to List
50416HV Compare Checkbox
Compare
1-1/2" Sweat Isolator w/ Drain - High Velocity
SKU:
50416HV
Webstone
SKU:
50416HV
Brand:
Webstone
–
+
$123.21
each
ADD TO CART
Add to List
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 172
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 172
Add to List
50417HV Compare Checkbox
Compare
2" Sweat Isolator w/ Drain - High Velocity
SKU:
50417HV
Webstone
SKU:
50417HV
Brand:
Webstone
–
+
$239.96
each
ADD TO CART
Add to List
In Stock
Get 4 by
Tomorrow, Jun 5
Total Available: 314
In Stock
Get 4 by
Tomorrow, Jun 5
Total Available: 314
Add to List
50413KIT Compare Checkbox
Compare
3/4" Sweat x Flange Isolator Circulator Pump Install Kit
SKU:
50413KIT
Webstone
SKU:
50413KIT
Brand:
Webstone
(1)
–
+
$113.42
each
ADD TO CART
Add to List
In Stock
Get 14 by
Tomorrow, Jun 5
Total Available: 272
In Stock
Get 14 by
Tomorrow, Jun 5
Total Available: 272
Add to List
50414KIT Compare Checkbox
Compare
1" Sweat x Flange Isolator Circulator Pump Install Kit
SKU:
50414KIT
Webstone
SKU:
50414KIT
Brand:
Webstone
(3)
–
+
$122.02
each
ADD TO CART
Add to List
In Stock
Get 18 by
Tomorrow, Jun 5
Total Available: 195
In Stock
Get 18 by
Tomorrow, Jun 5
Total Available: 195
Add to List
50415KIT Compare Checkbox
Compare
1-1/4" Sweat x Flange Isolator Circulator Pump Install Kit
SKU:
50415KIT
Webstone
SKU:
50415KIT
Brand:
Webstone
–
+
$225.62
each
ADD TO CART
Add to List
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 278
In Stock
Get 1 by
Tomorrow, Jun 5
Total Available: 278
Add to List
50414HVKIT Compare Checkbox
Compare
1" Sweat Isolator Circulator Pump Install Kit (High Velocity)
SKU:
50414HVKIT
Webstone
SKU:
50414HVKIT
Brand:
Webstone
(1)
–
+
$121.88
each
ADD TO CART
Add to List
In Stock
Get 5 by
Tomorrow, Jun 5
Total Available: 6
In Stock
Get 5 by
Tomorrow, Jun 5
Total Available: 6
Add to List
50415HVKIT Compare Checkbox
Compare
1-1/4" Sweat Isolator Circulator Pump Install Kit (High Velocity)
SKU:
50415HVKIT
Webstone
SKU:
50415HVKIT
Brand:
Webstone
–
+
$151.94
each
ADD TO CART
Add to List
In Stock
Get 12 by
Tomorrow, Jun 5
Total Available: 32
In Stock
Get 12 by
Tomorrow, Jun 5
Total Available: 32
Add to List
41413 Compare Checkbox
Compare
3/4" Threaded Isolator Flange w/ Multi-Function Drain and Rotating Flange
SKU:
41413
Webstone
SKU:
41413
Brand:
Webstone
(14)
–
+
$57.92
each
ADD TO CART
Add to List
In Stock
Get 5 by
Tomorrow, Jun 5
Total Available: 465
In Stock
Get 5 by
Tomorrow, Jun 5
Total Available: 465
Add to List
41413W Compare Checkbox
Compare
3/4" Threaded Isolator Flange w/ Multi-Function Drain & Rotating Flange, Lead Free
SKU:
41413W
Webstone
SKU:
41413W
Brand:
Webstone
(14)
–
+
$71.47
each
ADD TO CART
Add to List
In Stock
Get 5 by
Tomorrow, Jun 5
Total Available: 187
In Stock
Get 5 by
Tomorrow, Jun 5
Total Available: 187
Add to List
41414 Compare Checkbox
Compare
1" Threaded Isolator Flange w/ Drain & Rotating Flange
SKU:
41414
Webstone
SKU:
41414
Brand:
Webstone
(32)
–
+
$81.35
each
ADD TO CART
Add to List
In Stock
Get 4 by
Tomorrow, Jun 5
Total Available: 517
In Stock
Get 4 by
Tomorrow, Jun 5
Total Available: 517
Add to List
1
2
3
4
5
Resources
FAQs, Manuals & Videos
Videos
Get to Know the Webstone Series 4040 Isolation Valves for Heating Systems
Replacing a Circulator Pump
Circulator Pump Flange Selection
Close Resources
Refresh
×
Video