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Brett Aqualine
Spa Error Code
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Aqua-Flo FMXP/FMXP2/3 Pumps & Wet Ends
Determining whether your motor is a 48 or 56 Frame Motor.
The spa and pool industry use various "Frame" sizes to mount their "wet end" or pump to. A bracket mount motor has a welded base for mounting. These motors can be a 48 or 56 Frame.
Other types of motors such as the "C" Frame or Round Face and the Square Flange are all 56 Frame.
There are several ways to figure out the Frame size. One is to look at the spec sheet where it says Frame (FR) it might have some letters with it but will have 48 or 56 as the frame size.
The other way to determine is to measure the thru bolts (the 4 bolts that run thru the length of the motor and screw onto the wet end or volute of the pump). Measure the distance between the thru bolts,
DO NOT measure diagonally but from one bolt to the next bolt.
48 FRAME distance between the 2 bolts is 3 5/8 inch (Less than 4 inches)
56 FRAME distance between the 2 bolts is 4 1/8 inch*(Over 4 inches)
So if your bolt pattern is under 4 inches you have a 48 Frame and if your bolt pattern is over 4 inches you have a 56 Frame.
Because all manufactures do not call all things the same this is the best way to tell the Frame size.
But see the Exception below to the above measurements:
*PLEASE NOTE: AQUA-FLO FMXP FRAME Wet ends, have two different sizes on their 56 Frame Motors. They used 2 different motor manufactures, Emerson and Magnetek which can be different sizes.
Sundance Exception: On some Sundance Spas, they used some Emerson Motors that was a 56 Frame but had a thru bolt spacing of 4 inches (used between 1997-1998 on their Theramax II Pump). These pumps are the 6.1 diameter 56 Frame Wet Ends that we reference.
You must measure the distance between the thru bolts to determine the correct pump wet end for your spa.
How to Determine Spa Plumbing Size
Pump plumbing sizes are nominal, and not actual outside diameter (OD) of the threaded intake and/or discharge. Use a tape measure and check your old pump thread size against the sizing table
Plumbing Size Pump Thread OD (approx.)
1 1/2 Inch 2 3/8 Inch
2 Inch 3 Inch
2 1/2 Inch 3 5/8 Inch
Aqua-flo by Gecko
Aqua-Flo Wet End, 2.0 HP 2", 6.1"Diameter. 56 Frame FMXP2. Has a 4 inch spacing between thru bolts. Replacement Wet End for SUNDANCE SPAS Original Aqua-Flo Theramax Pump 1997-1999 with 4 inch thru bolt pattern. See MORE INFO!
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Aqua-flo by Gecko
Aqua-Flo Wet End, 2.5 HP 2", 6.1"Diameter. 56 Frame FMXP2. Has a 4 inch spacing between thru bolts. Replacement Wet End for SUNDANCE SPAS Original Aqua-Flo Theramax Pump 1997-1999 with 4 inch thru bolt pattern. See MORE INFO!
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Aqua-flo by Gecko
Aqua-Flo Wet End, 2Hp, 2" Unions, Side Discharge. 48 Frame FMXP. Thru Bolt spacing: 3 5/8 inch. Old part number: 91041610. Discontinued, new part number is 91041820-000
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Aqua-flo by Gecko
Aqua-Flo Wet End, 2.5Hp,2"MBT Side Discharge. For 48 Frame Pumps with a 3 5/8 thru bolt spacing. If your pump says 56 Frame (found on ID tag under Frame)see More Info.
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Sale Price: Out of Stock No ETA
Aqua-flo by Gecko
WET END: 4.0HP 56 FRAME WITH 6.3" VOLUTE 2" XP2E
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Aqua-flo by Gecko
Aqua-Flo FMXP2 Pump 2HP, 240 Volt.2 Speed. 48 Frame. Pump Unions included. For a better price, Click on More Info for Alternative pump. Save $$$.
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Aqua-flo by Gecko
Aqua-Flo FMXP2, 2.5HP, 240 Volt, 2 Speed. 48 Frame.
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Aqua-flo by Gecko
Wet End, 3.0 HP 2", 6.1"Diameter. 56 Frame FMXP2. Fits Motors Only with a 4 inch bolt pattern. See MORE INFO!
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List Price: $24.00
Sale Price: $14.85
Aqua-flo by Gecko
Aqua-Flo Pump Union Assy 2"Slip (Pair)
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Aqua-flo by Gecko
Aqua-Flo Wet End, 3Hp, 2"MBT Side Discharge, 48 Frame. Original is discontinued, this replaces the original.
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Aqua-flo by Gecko
Gecko Aqua-Flo XP2e Pump 06115517-2040, 1.5HP, 240Volt, 2 Speed, 48 Frame. Pump Unions included
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Aqua-flo by Gecko
Wet End, 2.5ohp 3.5thp2", 6.3"Diameter. 56 Frame FMXP2. 4 1/8 inch thru bolt pattern. See MORE INFO!
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Emerson, US Motors
US Motors (formerly Emerson) T55MWCCK-1213 has been labelled by spa manufacturers as 2.0, 2.5, 3.0, 3.5, 3.6, 4.0, 4.5HP. Replaces Century BN 51, BN62. The Amp rating is High speed 12.7 Amps, 2 Speed Motor. Amps will vary with HP of impeller.
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List Price: $475.00
Sale Price: $449.87
Century A.O. Smith Motors
4 HP 230/240 Volt Single Speed, 56 Frame Motor B237. This Motor Replaces Motor used on the 6500-901, 6500-902 and 6500-903. Cannot be used on the 6500-352 or LX Pump.
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