Skip to accessibility statement
Free shipping on orders over $99
●
Your Zip:
43230
ORDER STATUS
Your Zip:
43230
HELP
MENU
CONTACT & SUPPORT
Live Chat Offline:
Email Us
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
22 items
Reset
SORT
Top Sellers
Default
Price ▲
Price ▼
Product Availability
–
Show In Stock Only</strong> Filter (19)
Show
In Stock Only
(19)
Brand
–
Hydrolevel Filter (4)
Hydrolevel (4)
McDonnell & Miller Filter (10)
McDonnell & Miller (10)
Taco Filter (8)
Taco (8)
Reset Type
–
Automatic Filter (14)
Automatic (14)
Manual Filter (5)
Manual (5)
Review Score
–
5 Filter (9)
(9)
2 Filter (1)
(1)
Price Range
–
$50 to $60 Filter (2)
$50 to $60 (2)
$60 to $70 Filter (1)
$60 to $70 (1)
$100 to $200 Filter (15)
$100 to $200 (15)
$200 to $300 Filter (4)
$200 to $300 (4)
Home
Heating Supplies & Parts
Low Water Cutoffs
Water/Low Voltage Low Water Cutoffs
Water/Low Voltage Low Water Cutoffs
22 items
FILTER
Grid
List
Sort: Top Sellers
144703 Compare Checkbox
Compare
RB-122-E, GuardDog Electronic, 120V Low Water Cut-Off (Water)
SKU:
144703
McDonnell & Miller
SKU:
144703
Brand:
McDonnell & Miller
(2)
–
+
$150.50
each
ADD TO CART
Add to List
In Stock
Get 8 by
Tue, Jul 7
Total Available: 104
In Stock
Get 8 by
Tue, Jul 7
Total Available: 104
Add to List
45-1100 Compare Checkbox
Compare
Safgard 1100 Low Water Cutoff w/ Auto Reset & Burner Circuit Test Button - 24V
SKU:
45-1100
Hydrolevel
SKU:
45-1100
Brand:
Hydrolevel
(24)
–
+
$125.83
each
ADD TO CART
Add to List
In Stock
Get 70 by
Tue, Jul 7
Total Available: 237
In Stock
Get 70 by
Tue, Jul 7
Total Available: 237
Add to List
144701-MCDONNELL Compare Checkbox
Compare
RB-24SE, GuardDog Electronic, 24V Low Water Cut-Off (Water)
SKU:
144701-MCDONNELL
McDonnell & Miller
SKU:
144701-MCDONNELL
Brand:
McDonnell & Miller
–
+
$150.50
each
ADD TO CART
Add to List
In Stock
Get 43 by
Tue, Jul 7
Total Available: 89
In Stock
Get 43 by
Tue, Jul 7
Total Available: 89
Add to List
45-500 Compare Checkbox
Compare
Safgard 500 Low Water Cutoff w/ Manual Reset & Test Button/Light - 24V
SKU:
45-500
Hydrolevel
SKU:
45-500
Brand:
Hydrolevel
(24)
–
+
$200.99
each
ADD TO CART
Add to List
In Stock
Get 7 by
Tue, Jul 7
In Stock
Get 7 by
Tue, Jul 7
Add to List
LTR0243L-1 Compare Checkbox
Compare
Electronic, (24V) Low Water Cut-Off (Water), 3/4" NPT
SKU:
LTR0243L-1
Taco
SKU:
LTR0243L-1
Brand:
Taco
(4)
–
+
$144.36
each
ADD TO CART
Add to List
In Stock
Get 3 by
Tue, Jul 7
Total Available: 25
In Stock
Get 3 by
Tue, Jul 7
Total Available: 25
Add to List
LTR0243T-1 Compare Checkbox
Compare
Electronic, (24V) Low Water Cut-Off (Water), 3/4" NPT
SKU:
LTR0243T-1
Taco
SKU:
LTR0243T-1
Brand:
Taco
(8)
–
+
$131.83
each
ADD TO CART
Add to List
In Stock
Get 12 by
Tue, Jul 7
Total Available: 36
In Stock
Get 12 by
Tue, Jul 7
Total Available: 36
Add to List
RB-24SE Compare Checkbox
Compare
GuardDog Electronic, 24V Low Water Cut-Off (Water)
SKU:
RB-24SE
McDonnell & Miller
SKU:
RB-24SE
Brand:
McDonnell & Miller
–
+
$153.14
each
ADD TO CART
Add to List
In Stock
Get 27 by
Wed, Jul 8
Total Available: 30
In Stock
Get 27 by
Wed, Jul 8
Total Available: 30
Add to List
LTA0243S-2 Compare Checkbox
Compare
Electronic, (24V) Auto Reset Low Water Cut-Off (Water)
SKU:
LTA0243S-2
Taco
SKU:
LTA0243S-2
Brand:
Taco
(19)
–
+
$136.03
each
ADD TO CART
Add to List
In Stock
Get 8 by
Tue, Jul 7
Total Available: 100
In Stock
Get 8 by
Tue, Jul 7
Total Available: 100
Add to List
144726 Compare Checkbox
Compare
RB-24SE-L, GuardDog Electronic, 24V Low Water Cut-Off w/ Burner Control Harness (Water) (Gray Tubing)
SKU:
144726
McDonnell & Miller
SKU:
144726
Brand:
McDonnell & Miller
–
+
$157.50
each
ADD TO CART
Add to List
In Stock
Get 50 by
Tue, Jul 7
Total Available: 79
In Stock
Get 50 by
Tue, Jul 7
Total Available: 79
Add to List
LTRM0243L-1 Compare Checkbox
Compare
Electronic, (24V) Manual Reset Low Water Cut-Off (Water), 3/4" NPT
SKU:
LTRM0243L-1
Taco
SKU:
LTRM0243L-1
Brand:
Taco
–
+
$158.82
each
ADD TO CART
Add to List
In Stock
Get 5 by
Tue, Jul 7
Total Available: 11
In Stock
Get 5 by
Tue, Jul 7
Total Available: 11
Add to List
45-1103 Compare Checkbox
Compare
Safgard 1100H3 Low Water Cutoff w/ Auto Reset & Burner Circuit Test Button - 24V
SKU:
45-1103
Hydrolevel
SKU:
45-1103
Brand:
Hydrolevel
(2)
–
+
$122.84
each
ADD TO CART
Add to List
In Stock
Get 6 by
Tue, Jul 7
Total Available: 14
In Stock
Get 6 by
Tue, Jul 7
Total Available: 14
Add to List
LTRM0243T-1 Compare Checkbox
Compare
Electronic, (24V) Man. Reset Low Water Cut-Off (Water)
SKU:
LTRM0243T-1
Taco
SKU:
LTRM0243T-1
Brand:
Taco
–
+
$171.73
each
ADD TO CART
Add to List
In Stock
Get 2 by
Tue, Jul 7
Total Available: 53
In Stock
Get 2 by
Tue, Jul 7
Total Available: 53
Add to List
144691 Compare Checkbox
Compare
UWH-RB-24L Replacement Harness Cable for RB-24E-L
SKU:
144691
McDonnell & Miller
SKU:
144691
Brand:
McDonnell & Miller
(1)
–
+
$64.45
each
ADD TO CART
Add to List
In Stock
Get 2 by
Tue, Jul 7
Total Available: 5
In Stock
Get 2 by
Tue, Jul 7
Total Available: 5
Add to List
144725 Compare Checkbox
Compare
RB-24SE-S, GuardDog Electronic, 24V Low Water Cut-Off w/ Control Board Harness (Water)
SKU:
144725
McDonnell & Miller
SKU:
144725
Brand:
McDonnell & Miller
–
+
$157.50
each
ADD TO CART
Add to List
In Stock
Get 8 by
Tue, Jul 7
Total Available: 17
In Stock
Get 8 by
Tue, Jul 7
Total Available: 17
Add to List
LFM0243S-1 Compare Checkbox
Compare
Electronic, (24V) Man. Reset Low Water Cut-Off (Water)
SKU:
LFM0243S-1
Taco
SKU:
LFM0243S-1
Brand:
Taco
(3)
–
+
$249.47
each
ADD TO CART
Add to List
In Stock
Get 3 by
Tue, Jul 7
Total Available: 11
In Stock
Get 3 by
Tue, Jul 7
Total Available: 11
Add to List
144723 Compare Checkbox
Compare
RB-24SE-A, GuardDog Electronic, 24V Low Water Cut-Off w/ vent damper harness - (Water)
SKU:
144723
McDonnell & Miller
SKU:
144723
Brand:
McDonnell & Miller
–
+
$157.50
each
ADD TO CART
Add to List
In Stock
Get 2 by
Tue, Jul 7
Total Available: 9
In Stock
Get 2 by
Tue, Jul 7
Total Available: 9
Add to List
LFA0243S-1 Compare Checkbox
Compare
Electronic, (24V) Auto Reset Low Water Cut-Off (Water)
SKU:
LFA0243S-1
Taco
SKU:
LFA0243S-1
Brand:
Taco
(1)
–
+
$227.63
each
ADD TO CART
Add to List
In Stock
Get 4 by
Tue, Jul 7
Total Available: 9
In Stock
Get 4 by
Tue, Jul 7
Total Available: 9
Add to List
144681 Compare Checkbox
Compare
UWH-RB-24A Universal Wiring Harness
SKU:
144681
McDonnell & Miller
SKU:
144681
Brand:
McDonnell & Miller
–
+
$59.50
each
ADD TO CART
Add to List
In Stock
Get 9 by
Wed, Jul 8
In Stock
Get 9 by
Wed, Jul 8
Add to List
45-1107 Compare Checkbox
Compare
Safgard 1100H7 Low Water Cutoff with Harness - 24V
SKU:
45-1107
Hydrolevel
SKU:
45-1107
Brand:
Hydrolevel
–
+
$123.40
each
ADD TO CART
Add to List
In Stock
Get 1 by
Wed, Jul 8
Total Available: 3
In Stock
Get 1 by
Wed, Jul 8
Total Available: 3
Add to List
LFM0243R-1 Compare Checkbox
Compare
Electronic, (24V) Man. Reset 3/4" NPT Low Water Cut-Off, Remote Probe w/ NEMA 4 Enc. (Water)
SKU:
LFM0243R-1
Taco
SKU:
LFM0243R-1
Brand:
Taco
–
+
$222.39
each
ADD TO CART
Add to List
Backorder
Get it by
Tue, Aug 4 - Tue, Sep 1
Backorder
Get it by
Tue, Aug 4 - Tue, Sep 1
Add to List
144695 Compare Checkbox
Compare
UHW-RB-24B Replacement Wiring Harness for B-24E-B
SKU:
144695
McDonnell & Miller
SKU:
144695
Brand:
McDonnell & Miller
–
+
$56.70
each
ADD TO CART
Add to List
Backorder
Get it by
Tue, Aug 4 - Tue, Sep 1
Backorder
Get it by
Tue, Aug 4 - Tue, Sep 1
Add to List
144724 Compare Checkbox
Compare
RB-24SE-B, GuardDog Electronic, 24V Low Water Cut-Off w/ Burner Control Harness (Water) (Purple Tubing)
SKU:
144724
McDonnell & Miller
SKU:
144724
Brand:
McDonnell & Miller
–
+
$157.50
each
ADD TO CART
Add to List
Out of Stock
Get it by
Tue, Jul 21 - Tue, Jul 28
Out of Stock
Get it by
Tue, Jul 21 - Tue, Jul 28
Add to List
Didn't find what you're looking for?
Let us know
.
Refresh
×
Video