NOTICE: Due to planned maintenance, pricing and ordering functions will be unavailable from late Friday evening, January 16 to Saturday morning, January 17.

NOTICE: Website performance may be impacted by scheduled maintenance starting at 5:00 PM CST on 1/23/26

Serving the Midwest in HVAC, Plumbing, PVF, Well & Septic and Waterworks.

Site Search

{0} items in cart

loading content

Refine Results

: Bell & Gossett(18)
Caleffi(28)
WATTS®(3)
Webstone(29)
: 1 in(21)
1-1/4 in(15)
3/4 in(13)
1-1/2 in(11)
2 in(10)
: BRASS(47)
Cast Iron(12)
Standard Forged Brass(10)
Steel(5)
Forged Brass(4)
: Domestic(1)
Import(27)
: FNPT x FNPT(1)
Solder / SWT(1)
C(15)
flange(4)
FNPT(14)
: 240 deg F(1)
-20 to 320 deg F(1)
32 to 210 deg F(3)
300 deg F(6)
250 deg F(12)

Hydronic Air Separators

78 products

Sort

View

Per Page

content loaded

78004 Air Separator With Removable Vent Head and Coalescing Medium, 1" Nominal, Brass

78004 Air Separator With Removable Vent Head and Coalescing Medium, 1" Nominal, Brass

Item #WBS78004

MFG #78004

Compare

Caleffi Discal 551067AC Air Separator w/ Expansion Tank Check, 1-1/4" Press

Item #CLF551067AC

MFG #551067AC

Compare

Caleffi Discal 551066AC Air Separator w/ Expansion Tank Check, 1" Press

Caleffi Discal 551066AC Air Separator w/ Expansion Tank Check, 1" Press

Item #CLF551066AC

MFG #551066AC

Compare

Webstone 78005 Air Separator w/ Removable Vent Head and Coalescing Medium, Brass

Webstone 78005 Air Separator w/ Removable Vent Head and Coalescing Medium, Brass

Item #WBS78005

MFG #78005

Compare

DISCAL® 551067A Air Separator, 1-1/4", Integral Press, 150 psi, 32 to 250 deg F, Brass

DISCAL® 551067A Air Separator, 1-1/4", Integral Press, 150 psi, 32 to 250 deg F, Brass

Item #CLF551067A

MFG #551067A

Compare

Webstone Pro-Connect Press 78003 Air Separator With Removable Vent Head and Coalescing Medium, 3/4", Press, 150 psi, Brass, Import

Webstone Pro-Connect Press 78003 Air Separator With Removable Vent Head and Coalescing Medium, 3/4", Press, 150 psi, Brass, Import

Item #WBS78003

MFG #78003

Compare

Webstone 74003 Air Separator With Removable Vent Head and Coalescing Medium, 3/4", IPS, 150 psi, Brass, Import

Webstone 74003 Air Separator With Removable Vent Head and Coalescing Medium, 3/4", IPS, 150 psi, Brass, Import

Item #WBS74003

MFG #74003

Compare

Bell & Gossett 112464 EASB-JR Air Separator, 2", NPT, 150 psi, 250 deg F, Brass

Bell & Gossett 112464 EASB-JR Air Separator, 2", NPT, 150 psi, 250 deg F, Brass

Item #BEL112464

MFG #112464

Discontinued

Compare

Webstone H-78005 Pro-Connect Press™ 78005 PRS-7X00 Horizontal Air Separator, 1-1/4" Nominal, Press Connection, 150 psi CWP Working, 250 deg F, Brass

Webstone H-78005 Pro-Connect Press™ 78005 PRS-7X00 Horizontal Air Separator, 1-1/4" Nominal, Press Connection, 150 psi CWP Working, 250 deg F, Brass

Item #WBSH78005

MFG #H-78005

Compare

First Mobile presents FirstSupply.com in a tile-based menu on your phone!

First InStock is our scannable label program makes it easy to stock your shop with First Supply!