Replacement Parts
Table Of Contents
- commercial & residential pumps
- Design Envelope Compass Circulators
- Astro 2 Circulators
- Astro 2 Hot Water Recirculation Systems
- Astro 2 24-hour timer
- Aquastat controls
- Astro Express 2 Hot Water Recirculation
- S&H 3-Piece Circulators
- 1050 & 1060 3-Piece Circulators
- E.2 Circulators
- E.2 Circulator Spool Pieces
- 4270 & 4270 Stock Motor Mounted Pumps
- 4360 Pump-in-a-Box
- 4380 Pump-in-a-Box
- Design Envelope 4300/4380 Pump-in-a-Box
- hydronic specialties
- circuit balancing valves (cbv)
- replacement parts
- parts look up
- competition circulator cross reference
- technical data
- Pump Formulas
- Pressures & Altitudes
- Freezing & Boiling Points
- Ethylene Glycol Properties
- Propylene Glycol Properties
- Water Properties
- Useful System Curve Formulas
- Pipe Maximum Pressures
- Hydraulic Resistance
- Pipe Information
- Pipe Fittings & Valves Friction Loss
- Water Flow Calculator
- Unit Conversions
- Typical Symbols
- Product Solution Outlines/Brochures
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HYDRONIC SOLUTIONS CATALOG
IMPELLERS
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PARTS COMPARISON
armstrong b&g equivalent
model part # model part #
S-25
812961-011 Steel
812961-841 Brass
Series 100
118431 Brass
118840 (Discontinued)
armstrong b&g equivalent
model part # model part #
816556-011 Steel
816556-841 Brass
HV & 2" (old stlye)
118668 Steel
118436 Brass
armstrong b&g equivalent
model part # model part #
806331-111 NFI 1" & 1½" (old stlye)
118665-6 Steel
118434-5 Brass
armstrong b&g equivalent
model part # model part #
S-45 2½"
or 3"
816305-028 Steel
816305-058 Brass
2½" & LD-3
118676 Steel
118440 Brass
1
W
1½
2O
Y
G/
af
W
1G/af
3C/h
1A/d
G/h
E/
h
C/cb
3V
1A/d
I/a
f
A/af
G/h
1
K
2
½
2
3Y
3W
½
1
armstrong b&g equivalent
model part # model part #
S-25 812961-111 NFI Series 100 189132
1
W
1K
1NX
½
2O
dimensions