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Most often needed parts for a watermatic 300 fountain in yellow or green color...
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ma 250W / 120V Donut Immersion Heater - non coatedma 250W / 120V Donut Immersion Heater - non coated16311-NC
Non-Coated - It's best to remove immersion heaters from fountains when chance of freezing is over.
mb 250W / 120V Donut Immersion Heater - coatedmb 250W / 120V Donut Immersion Heater - coated16311-C
This Heater is Covered With a Protective Teflon Coating - But it's still best to remove it from the fountain when chance of freezing weather is over.
na Deluxe Small Fountain Installation Kitna Deluxe Small Fountain Installation KitDSFIK
Installs Watermatics, Ecofounts, Omni 1,2,3, and CT1 with stainless bolts, ball valve, & insulation for lines
nb Small Fountain Installation Kitnb Small Fountain Installation KitSFIK
Pipe Insulation Not Included - Order # DWMIK if you need insulation too.
oa Anchor Bolt Kit Plated Steeloa Anchor Bolt Kit Plated SteelABKPS
Plated Steel - Less money, but can eventually rust off - Washers shown, but not included.
ob Anchor Bolt Kit Stainless Steelob Anchor Bolt Kit Stainless SteelABKSS
These "Forever" Wedge Anchors are made of stainless steel - Washers shown, but not included.
oc Water Supply Winterize Kitoc Water Supply Winterize KitWSWK
Winterizes Water Supply Lines (2-piece kit)
pa 3/4 x 1/2 Ball Valve Kitpa 3/4 x 1/2 Ball Valve Kit34x12BVK
American Made By The Spears Company
qac 3" Expanding Drain Plug for Watermatics & Watermastersqac 3" Expanding Drain Plug for Watermatics & Watermasters18470
This is the latest design of drain plug that is used on the Watermatic and Watermaster fountains.
sca 3/4" Watermatic Float / Valve Assysca 3/4" Watermatic Float / Valve Assy34WMFVA
3/4" 40-60 psi float valve assembly for the Watermatic 300, 1000, Watermaster 54, 54D, 90, 96, 600, 1200, Cattlemaster 480, 840, 1440, 10T and the Thriftyking CT 2 & 4.

scb 3/4" Male White Valve (5-40 psi)scb 3/4" Male White Valve (5-40 psi)16697
3/4" 40-60 psi white float valve which can be used on any fountain that uses the 3/4" male valve. 
scc 3/4" Male Red Valve (40-60 psi)scc 3/4" Male Red Valve (40-60 psi)11101
3/4" 40-60 psi red float valve which can be used on any fountain that uses the 3/4" male valve. 
scd 3/4" Male Red Valve w/ 1/8" CF Side Tap (40-60 psi)scd 3/4" Male Red Valve w/ 1/8" CF Side Tap (40-60 psi)11142
3/4" 40-60 psi red float valve with 1/8" constant flow side tap - it could be used on any fountain that uses the 3/4" male valve.
sce 1/8"mpt x 1/4"comp Brass Angle Needle Pitcock Valvesce 1/8"mpt x 1/4"comp Brass Angle Needle Pitcock Valve11793
This is the brass 1/8"mpt x 1/4"comp angle needle pitcock valve used with the 11142 side tapped float valve to make the fountain able to heat itself by the "constant flow" method. 
scf 3/4" Male Green Valve (60-80 psi)scf 3/4" Male Green Valve (60-80 psi)15377
3/4" 60-80 psi greem float valve which can be used on any fountain that uses the 3/4" male valve. 
scg 3/4" Male Blue Valve (80-100 psi)scg 3/4" Male Blue Valve (80-100 psi)18197
-Discontinued-
3/4" 80-100 psi blue float valve which can be used on any fountain that uses the 3/4" male valve. Order the new 18832 high pressure valve & float assembly instead.
sda Inlet Pkg For 3/4" Male White Valvesda Inlet Pkg For 3/4" Male White Valve18626
3/4" Inlet Package for the White Male Valve. This piece could be used on the valve found in any of the 3/4" male valved fountians. 
sdb Inlet Pkg For 3/4" Male Red Valvesdb Inlet Pkg For 3/4" Male Red Valve18606
3/4" Inlet Package for the Red Male Valve. This piece could be used on the valve found in any of the 3/4" male valved fountians. 
sdc Inlet Pkg For 3/4" Male Green Valvesdc Inlet Pkg For 3/4" Male Green Valve18622
3/4" Inlet Package for the Green Male Valve. This piece could be used on the valve found in any of the 3/4" male valved fountians. 
sfd 3/4" Valve Plunger Pkg with Button, Nose-piece & Gasketsfd 3/4" Valve Plunger Pkg with Button, Nose-piece & Gasket15259
3/4" Valve Plunger Pkg with Button, Nose-piece & Gasket. This is the only way you can purchase the 3/4" valve plunger with rubber button. 
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