Webstone Isolator Pump Flange Valves

Webstone Isolator series valves are compatible with all major brand circulator pumps, including Taco (“00” series except 0012), Grundfos (UP/UPS 15 and 26, Alpha) and others. Each isolator valve comes with a set of bolts & nuts as well as additional T-style handle. For heating applications only.
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1/2" IPS Isolator Flange Valve Webstone Valves
1/2" IPS Isolator Flange Valve
Part#: 40402 Brand: Webstone Valves
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(8)
$34.95 / each
$332.00 box of 10 + Free Shipping
($33.20 each)
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3/4" IPS Isolator Flange Valve Webstone Valves
3/4" IPS Isolator Flange Valve
Part#: 40403 Brand: Webstone Valves
In Stock
(8)
$36.95 / each
$351.00 box of 10 + Free Shipping
($35.10 each)
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1" IPS Isolator Flange Valve Webstone Valves
1" IPS Isolator Flange Valve
Part#: 40404 Brand: Webstone Valves
In Stock
(8)
$44.95 / each
$427.00 box of 10 + Free Shipping
($42.70 each)
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1-1/4" IPS Isolator Flange Valve Webstone Valves
1-1/4" IPS Isolator Flange Valve
Part#: 40405 Brand: Webstone Valves
In Stock
(8)
$55.95 / each
$532.00 box of 10 + Free Shipping
($53.20 each)
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3/4" IPS Isolator Flange Valve with Drain Webstone Valves
3/4" IPS Isolator Flange Valve with Drain
Part#: 40413 Brand: Webstone Valves
In Stock
(4)
$52.95 / each
$502.50 box of 10 + Free Shipping
($50.25 each)
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1" IPS Isolator Flange Valve with Drain Webstone Valves
1" IPS Isolator Flange Valve with Drain
Part#: 40414 Brand: Webstone Valves
In Stock
(4)
$63.95 / each
$607.50 box of 10 + Free Shipping
($60.75 each)
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1-1/4" IPS Isolator Flange Valve with Drain Webstone Valves
1-1/4" IPS Isolator Flange Valve with Drain
Part#: 40415 Brand: Webstone Valves
In Stock
(4)
$80.95 / each
$769.00 box of 10 + Free Shipping
($76.90 each)
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3/4" IPS Isolator Valve w/ Rotating Flange Webstone Valves
3/4" IPS Isolator Valve w/ Rotating Flange
Part#: 41403 Brand: Webstone Valves
In Stock
(4)
$36.95 / each
$351.40 box of 10 + Free Shipping
($35.14 each)
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1" IPS Isolator Valve w/ Rotating Flange Webstone Valves
1" IPS Isolator Valve w/ Rotating Flange
Part#: 41404 Brand: Webstone Valves
In Stock
(4)
$44.95 / each
$427.00 box of 10 + Free Shipping
($42.70 each)
Add to Cart
1-1/4" IPS Isolator Valve w/ Rotating Flange Webstone Valves
1-1/4" IPS Isolator Valve w/ Rotating Flange
Part#: 41405 Brand: Webstone Valves
In Stock
(4)
$55.95 / each
$532.00 box of 10 + Free Shipping
($53.20 each)
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1/2" Sweat Isolator Flange Valve Webstone Valves
1/2" Sweat Isolator Flange Valve
Part#: 50402 Brand: Webstone Valves
In Stock
(8)
$34.95 / each
$332.00 box of 10 + Free Shipping
($33.20 each)
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3/4" Sweat Isolator Flange Valve Webstone Valves
3/4" Sweat Isolator Flange Valve
Part#: 50403 Brand: Webstone Valves
In Stock
(8)
$36.95 / each
$351.00 box of 10 + Free Shipping
($35.10 each)
Add to Cart
1" Sweat Isolator Flange Valve Webstone Valves
1" Sweat Isolator Flange Valve
Part#: 50404 Brand: Webstone Valves
In Stock
(8)
$44.95 / each
$427.00 box of 10 + Free Shipping
($42.70 each)
Add to Cart
1-1/4" Sweat Isolator Flange Valve Webstone Valves
1-1/4" Sweat Isolator Flange Valve
Part#: 50405 Brand: Webstone Valves
In Stock
(8)
$55.95 / each
$532.00 box of 10 + Free Shipping
($53.20 each)
Add to Cart
3/4" Sweat Isolator Flange Valve with Drain Webstone Valves
3/4" Sweat Isolator Flange Valve with Drain
Part#: 50413 Brand: Webstone Valves
In Stock
(4)
$52.95 / each
$502.50 box of 10 + Free Shipping
($50.25 each)
Add to Cart
1" Sweat Isolator Flange Valve with Drain Webstone Valves
1" Sweat Isolator Flange Valve with Drain
Part#: 50414 Brand: Webstone Valves
In Stock
(4)
$64.65 / each
$614.00 box of 10 + Free Shipping
($61.40 each)
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1-1/4" Sweat Isolator Flange Valve with Drain Webstone Valves
1-1/4" Sweat Isolator Flange Valve with Drain
Part#: 50415 Brand: Webstone Valves
In Stock
(4)
$81.95 / each
$778.50 box of 10 + Free Shipping
($77.85 each)
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3/4" Sweat Isolator Valve w/ Rotating Flange Webstone Valves
3/4" Sweat Isolator Valve w/ Rotating Flange
Part#: 51403 Brand: Webstone Valves
In Stock
(4)
$36.95 / each
$351.00 box of 10 + Free Shipping
($35.10 each)
Add to Cart
1" Sweat Isolator Valve w/ Rotating Flange Webstone Valves
1" Sweat Isolator Valve w/ Rotating Flange
Part#: 51404 Brand: Webstone Valves
In Stock
(4)
$44.95 / each
$427.00 box of 10 + Free Shipping
($42.70 each)
Add to Cart
1-1/4" Sweat Isolator Valve w/ Rotating Flange Webstone Valves
1-1/4" Sweat Isolator Valve w/ Rotating Flange
Part#: 51405 Brand: Webstone Valves
In Stock
(4)
$55.95 / each
$532.00 box of 10 + Free Shipping
($53.20 each)
Add to Cart
3/4" FPT Isolator Flange Valve w/ Drain & Rotating Flange Webstone Valves
3/4" FPT Isolator Flange Valve w/ Drain & Rotating Flange
Part#: 41413 Brand: Webstone Valves
In Stock
(3)
$52.95 / each
$502.50 box of 10 + Free Shipping
($50.25 each)
Add to Cart

About Webstone Isolator Series

Isolator flange valves offer fast, convenient and cost effective means of installing a circulator pump. These valves are manufactured from forged brass to last for a lifetime of the system. Webstone isolator valve eliminates unnecessary work and replaces traditional combination of components such as pump flanges, ball valves, pipe nipples, drain valves, etc.
4040 and 5040 Webstone models are standard isolator valves in threaded and sweat connections respectively. 4041 and 5041 models feature a full-flow drain valve. 4140 and 5140 models come with a rotating flange.
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