4.5 out of 5
Magic Plastics 0121108015 Split Nut, 1-1/2" Buttress Thread, Heater Union
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Pricing Note
Product Description
Manufacturer Part Number: 0121108015
California Residents WARNING: This product can expose you to chemicalsincluding Vinyl Chloride and Carbon Black, which is known to the Stateof California to cause cancer
www.P65Warnings.ca.gov
1-1/2" split compression nut
>> Pumps
>> Waterway E-Series Wet End (6 Screw Faceplate)
>> Waterway Center Discharge Spa Pump (4 Screw Faceplate)
>> Waterway Center Discharge Pool Pump (4 Screw Faceplace)
Choosing a pump with a Horizon number ending in 'W' or 'N' guarantees a pump with a US Motor (N), or a pump with a Century AO Smith Motor (W).
The Waterway center discharge wet end has been discontinued and replaced with the E-Series Center Discharge wet end by the manufacturer. Please be sure which wet end you have as the parts are not interchangeable. The easiest way to identify which wet end you have is to count the number of screws on the faceplate. The old center discharge pump had a 4-screw faceplate and the new E-Series has a 6-screw faceplate. If you need parts for the old center discharge wet ends, you will need to replace the whole wet end with a new E-Series Center Discharge wet end.
The new 6-screw E-Series wet ends from 2015 - present use a PS-200 shaft seal.
Product Description
California Residents WARNING: This product can expose you to chemicalsincluding Vinyl Chloride and Carbon Black, which is known to the Stateof California to cause cancerwww.P65Warnings.ca.gov
1-1/2" split compression nut
Specifications
Search Using These Specs
| Heater Union Part Type | Split Nut |
| First Plumbing Connection Size | 1-1/2" |
| First Plumbing Connection Type | Female Buttress Thread (fbt) |
| Second Plumbing Connection Size | 1-15/16" |
| Second Plumbing Connection Type | Large Flange (For Metal Housings) |
Below are the exploded diagrams relevant to this product:
Pool & Spa Supplies>> Pumps
>> Waterway E-Series Wet End (6 Screw Faceplate)
>> Waterway Center Discharge Spa Pump (4 Screw Faceplate)
>> Waterway Center Discharge Pool Pump (4 Screw Faceplace)
Waterway E-Series Wet End (6 Screw Faceplate)
Choosing a pump with a Horizon number ending in 'W' or 'N' guarantees a pump with a US Motor (N), or a pump with a Century AO Smith Motor (W).
The Waterway center discharge wet end has been discontinued and replaced with the E-Series Center Discharge wet end by the manufacturer. Please be sure which wet end you have as the parts are not interchangeable. The easiest way to identify which wet end you have is to count the number of screws on the faceplate. The old center discharge pump had a 4-screw faceplate and the new E-Series has a 6-screw faceplate. If you need parts for the old center discharge wet ends, you will need to replace the whole wet end with a new E-Series Center Discharge wet end.
The new 6-screw E-Series wet ends from 2015 - present use a PS-200 shaft seal.
Parts
| Key | SKU | Description | Manf. # |
|---|---|---|---|
| 1 | 35-270-1306 | Trap Assy, WW Ctr Disch/Spa-Flo, 1-1/2"Union x 1-1/2"mbt/fpt | 310-5400 |
| 2 | Discontinued | Trap Lid, Waterway Hi-Flo/Mustang/Workhorse/Workman | 319-4100 |
| 3 | 90-423-5436 | O-Ring, Buna-N, 5-7/8" ID, 1/4" Cross Section, Generic | |
| 4 | 35-270-1828 | Basket, Pump, OEM Waterway 6" Trap | 319-3230 |
| 5 | 35-270-1764 | Drain Plug, Waterway EX2/Hi-Flo II | 715-4020 |
| 6 | 90-423-7111 | O-Ring, 7/16" ID, 3/32" Cross Section, Generic | |
| 7 | 35-270-1510 | Trap Body, Waterway, 1-1/2"mbt/1-1/2"fpt x 1-1/2" flange | 319-2160 |
| 8 | 89-238-1015 | Split Nut, 1-1/2" Buttress Thread, Heater Union | 0121108015 |
| 9 | 90-423-7014 | O-Ring, 1/2" ID, 1/16" Cross Section, Generic | |
| 10 | 35-270-1487 | Screw, WW E-Series/Hi-Flo/Viper/Workman/EX2, 8-32 x 5/8" | 819-1110 |
| 11 | 35-270-1455 | Faceplate, Waterway E-Series, 6-Bolt, Center Disch | 311-1070 |
| 12 | Discontinued | Impeller, Waterway E-Series/Hi-Flo II, 0.5 Horsepower | 310-8000 |
| 12 | 35-270-1461 | Impeller, Waterway E-Series/Hi-Flo II, 0.75 Horsepower | 310-8010 |
| 12 | 35-270-1462 | Impeller, Waterway E-Series/Hi-Flo II, 1.0 Horsepower (Red) | 310-8020 |
| 12 | 35-270-1463 | Impeller, Waterway E-Series/Hi-Flo II, 1.5 HP (Yellow) | 310-8030 |
| 12 | Discontinued | Impeller, Waterway E-Series/Hi-Flo II, 2.0 Horsepower(White) | 310-8040 |
| 14 | 90-423-5252 | O-Ring, 5-1/4" ID, 1/8" Cross Section, Generic | |
| 15 | 35-270-1450 | Volute, Waterway E-Series, 6-Screw, Center Disch | 315-1070 |
| 15 | 35-270-1457 | Volute, Waterway "E" Series, 2", Side Discharge | 315-2520 |
| Key | SKU | Description | Manf. # |
|---|---|---|---|
| 16 | 34-270-1125 | Wet End, WW E-Series 0.5hp 1-1/2"mbt/fpt 48fr | 310-1110 |
| 16 | 34-270-1130 | Wet End, WW E-Series 0.75hp 1-1/2"mbt/fpt 48fr | 310-1120 |
| 16 | 34-270-1135 | Wet End, WW E-Series 1.0hp 1-1/2"mbt/fpt 48fr | 310-1130 |
| 16 | 34-270-1140 | Wet End, WW E-Series 1.5hp 1-1/2"mbt/fpt 48fr | 310-1140 |
| 16 | 34-270-1145 | Wet End, WW E-Series 2.0hp 1-1/2"mbt/fpt 48fr | 310-1141 |
| Key | SKU | Description | Manf. # |
|---|---|---|---|
| 17a | 35-126-1005 | Motor, Century, 0.75 Horsepower, 115v, 1 Speed, 48 Frame | BN24V1 |
| 17a | Discontinued | Motor, Century/WW, 0.75hp, 115v, 1-Speed, 48YFr, 60Hz | BN24V1 |
| 17a | 35-126-1010 | Motor, Century, 1.0 Horsepower, 115v, 1 Speed, 48 Frame | BN25V1 |
| 17a | Discontinued | Motor, Century/WW, 1.0SPL, 115v, 1-Speed, 48 Frame | BN25 |
| 17a | Discontinued | Motor, Century, 1.5 Horsepower, 115v, 1 Speed, 48 Frame | BV35 |
| 17a | 35-126-1020 | Motor, Century, 1.5 Horsepower, 115v/230v, 1 Speed, 48 Frame | BN35V1 |
| 17a | Discontinued | Motor, Century/WW, 1.5hp, 115v/230v, 1-Speed, 48 Frame | BN35V1 |
| 17a | 35-126-1025 | Motor, Century, 2.0 Horsepower, 115v/230v, 1 Speed, 48 Frame | BN40SS |
| 17a | Discontinued | Motor, Century/WW, 2.0hp, 115v/230v, 1-Speed, 48 Frame | BN40 |
| 17a | Discontinued | Motor, US Motor/WW, 0.75 SPL, 115v, 1-Speed, 48 Frame | EZBN24 |
| 17a | Discontinued | Motor, US Motor/WW, 1.0SPL, 115v, 1-Speed, 48 Frame | EZBN25 |
| Key | SKU | Description | Manf. # |
|---|---|---|---|
| 17b | 35-126-1105 | Motor, Century, 0.75 Horsepower, 115v, 2 Speed, 48 Frame | BN36 |
| 17b | Discontinued | Motor, Century/WW, 0.75hp, 115v, 2-Speed, 48 Frame | BN36 |
| 17b | 35-126-1110 | Motor, Century, 1.0 Horsepower, 115v, 2 Speed, 48 Frame | BN37V1 |
| 17b | Discontinued | Motor, Century/WW, 1.0hp, 115v, 2-Speed, 48 Frame | BN37V1 |
| 17b | 35-126-1115 | Motor, Century, 1.5 Horsepower, 115v, 2 Speed, 48 Frame | BN50V1 |
| 17b | Discontinued | Motor, Century/WW, 1.5hp, 115v, 2-Speed, 48 Frame | BN50V1 |
| 17b | 35-126-1116 | Motor, Century, 1.5 Horsepower, 230v, 2 Speed, 48 Frame | BN34V1 |
| 17b | Discontinued | Motor, Century/WW, 1.5hp, 230v, 2-Speed, 48 Frame | BN34V1 |
| 17b | 35-126-1119 | Motor, Century, 3.0 SPL, 230v, 2 Speed, 48 Frame, EE | BN61 |
| 17b | Discontinued | Motor, Century/WW, 3.0SPL, 230v, 2-Speed, 48 Frame | BN61 |
| 17b | 35-126-1120 | Motor, Century, 2.0 Horsepower, 230v, 2 Speed, 48 Frame | BN51 |
| 17b | Discontinued | Motor, Century/WW, 2.0hp, 230v, 2-Speed, 48 Frame | BN51 |
| 17b | 35-126-1121 | Motor, Century, 3.0 Horsepower, 230v, 2 Speed, 48 Frame | BN62 |
| 17b | Discontinued | Motor, Century/WW, 4.5hp, 230v, 2-Speed, 48 Frame | BN62 |
| 17b | 35-126-1123 | Motor, Century, 3.0 Horsepower, 230v, 2 Speed, 48 Frame | SDS1302 |
| 17b | Discontinued | Motor, US Motor/WW, 1.0SPL, 115v, 2-Speed, 48 Frame | EZBN37 |
| 17b | Discontinued | Motor, US Motor/WW, 1.5SPL, 115v, 2 Speed, 48 Frame | EZBN50 |
| 17b | Discontinued | Motor, US Motors/WW, 3.0hp, 230v, 2-Speed, 48 Frame | SPH30FL2S |
| 17b | Discontinued | Motor, US Motor/WW, 4.5hp, 230v, 2 Speed, 48 Frame | SPH30FL2SSPL |
| Key | SKU | Description | Manf. # |
|---|---|---|---|
| 18a | Discontinued | Pump, WW E-Series, 1.5hp SPL, 1-Spd, 48fr, 1-1/2", Nema, OEM | 3410612-1502 |
| 18a | 34-270-3604 | Pump, WW E-Series, 0.75SPL, 115v, 1-Spd, 48fr, 1-1/2", OEM | 3410310-15 |
| 18a | 34-270-3606 | Pump, WW E-Series, 1.0SPL, 115v, 1-Spd, 48fr, 1-1/2", OEM | 3410410-15 |
| 18a | 34-270-3608 | Pump, WW E-Series, 1.5hp, 115v, 1-Spd, 48fr, 1-1/2", OEM | 3410610-15 |
| 18a | Discontinued | Pump,WW E-Series,2.0hp,115v/230v,1-Spd,48fr,1-1/2",OEM | 3410830-15 |
| 18a | 34-270-3612 | Pump, WW E-Series, 0.75hp, 115v, 2-Spd, 48fr, 1-1/2", OEM | 3420310-15 |
| 18a | 34-270-3614 | Pump, WW E-Series, 1.0hp, 115v, 2-Spd, 48fr, 1-1/2", OEM | 3420410-15 |
| 18a | 34-270-3616 | Pump, WW E-Series, 1.5SPL, 115v, 2-Spd, 48fr, 1-1/2", OEM | 3420610-15 |
| 18a | Discontinued | Pump,WW E-Series,1.5hp,230v,2-Spd,48fr,1-1/2",OEM | 3420620-15 |
| 18a | Discontinued | Pump,WW E-Series,2.0hp,230v,2-Spd,48fr,1-1/2",OEM | 3420820-15 |
| Key | SKU | Description | Manf. # |
|---|---|---|---|
| 18b | Discontinued | Pump, WW E-Series, 0.75SPL USMotor, 115v, 1-Spd,48fr, 1-1/2" | 3410310-15HZN |
| 18b | Discontinued | Pump, WW E-Series, 0.75SPL Century, 115v,1-Spd, 48fr, 1-1/2" | 3410310-15HZW |
| 18b | 34-270-3003N | Pump, WW E-Series, 1.0SPL US Motor, 115v, 1-Spd, 48fr,1-1/2" | 3410410-15HZN |
| 18b | 34-270-3003W | Pump, WW E-Series, 1.0SPL Century, 115v, 1-Spd, 48fr, 1-1/2" | 3410410-15HZW |
| 18b | Discontinued | Pump, WW E-Series, 1.5hp Century, Conv, 1-Spd, 48fr, 1-1/2" | 3410610-15HZW |
| 18b | Discontinued | Pump, WW E-Series,2.0hp Century,Conv, 1-Spd,48fr,1-1/2" | 3410830-15HZW |
| 18b | 34-270-3021W | Pump, WW E-Series, 0.75hp Century, 115v, 2-Spd, 48fr, 1-1/2" | 3420310-15HZW |
| 18b | Discontinued | Pump, WW E-Series, 1.0SPL US Motor,115v, 2-Spd,48fr, 1-1/2" | 3420410-15HZN |
| 18b | Discontinued | Pump, WW E-Series, 1.0hp Century, 115v, 2-Spd, 48fr, 1-1/2" | 3420410-15HZW |
| 18b | 34-270-3025N | Pump, WW E-Series, 1.5SPL US Motor, 115v, 2-Spd,48fr,1-1/2" | 3420610-15HZN |
| 18b | 34-270-3025W | Pump, WW E-Series, 1.5hp Century, 115v, 2-Spd, 48fr, 1-1/2" | 3420610-15HZW |
| 18b | Discontinued | Pump, WW E-Series, 1.5hp Century,230v,2-Spd,48fr,1-1/2" | 3420620-15HZW |
| 18b | Discontinued | Pump, WW E-Series,2.0hp Century,230v, 2-Spd,48fr,1-1/2" | 3420820-15HZW |
Attention CA Residents: Prop 65 Warning
WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
Return Policy
Unless the item is defective, once any part is installed, it is not returnable. Return is subject to a restocking fee of 30%.
Need more information?
Our staff are available to answer any questions you may have about this item
Our staff are available to answer any questions you may have about this item
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Customer Reviews
By Pony - straight shooting reviews
Date: November 05, 2025
Broke the flange nut on my spa pump trying to remove it (to service my pump seals). Ordered this to replace, it was simple/easy, would buy it again.
Rating: 
[1 of 5 Stars!]
[1 of 5 Stars!]
By John Sheffield
Date: July 22, 2024
I have had 3 nut connectors on the plumbing within my spa crack. These split nut connectors safe the day because I don't need to redo the plumbing just to replace the cracked nut.
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By Big Gilby
Date: June 15, 2024
This collar came quickly and as advertised. It works great. Replace a cracked, leaky collar with this one and didn't have to rebuild the section.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By gabriella
Date: December 28, 2023
A fast easy fix, sure beats cutting and splicing the pipe to replace the old cracked one
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Norman
Date: October 18, 2023
So far, so good, works great.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Kenneth S.
Date: March 28, 2023
Works nicely to bypass the plumbing issues involved with replacing a broken coupler.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]