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SPLIT NUT UNIONS, HEATER TAILPIECES, UNI-NUTS & GASKETS

 

How to Measure for a Split Nut Replacement


Measure the Inside Diameter (ID) of your current "CLOSED" split nut or regular nut. If it measures:

2-7/16" then you need a 1-1/2"
3-1/16" then you need a 2"
3-11/16" then you need a 2-1/2"

 

SPLIT NUT UNIONS

1.5" Split Nut

Part Number: 89-238-1015

Identical to:
700400
121108015
400-5491

Description
1-1/2" split compression nut

2" Split Nut

Part Number: 89-238-1040

Identical to:
700310C
121108020
20-1021
400-5421

Description
2" split compression nut

 

HEATER SPLIT NUTS

1 1/2" Heater Split Nut W/Screws, Waterway

Part Number: 89-238-1012

Identical to: 400-5491

Description
1 1/2" Heater Split Nut W/Screws

2 1/2" Split Nut, For Heaters

Part Number: 89-238-1042

Identical to: 121108025

Description
2 1/2" Split Nut, For Heaters
 


2" Split Nut, for Heaters  w/Screws, Waterway

Part Number: 89-238-1044

Identical to:
610266
400-5421 

Description
2" Split Nut, for Heaters w/Screws, Waterway

 

UNI-NUTS

Aquatemp Products Heater Uni-Nut®
It is a patented design to end leaking split nuts on heaters. The Uni-Nut® is a one-piece nut that can be tightened by hand and changed in the field by removing a color-coded retainer. The black retainer is generally used on 1-5/8" tube while blue retainers are used on 5.5kW heaters. Red retainers usually denote heaters of other wattages. Although there may sometimes be exceptions, the Uni-Nut® is generally not a replacement for split nuts due to different flange sizes

 

Heater Uni-Nut 1-1/2" for 1.9"/1-5/8" Housings

Part Number: 89-371-1009

Identical to:
609876
AQT8602338
86-02338

Description
Heater Uni-Nut 1-1/2" for 1.9"/1-5/8" Housings



Heater Uni-Nut 2-1/2" for 3" Housings

Part Number: 89-371-1017

Identical to:
611397
86-02370


Description
Heater Uni-Nut 2-1/2" for 3" Housings


UNI-NUT RETAINERS


1-1/2" Uni-Nut Retainer for 1-5/8" Housings

Part Number: 89-371-1040


1-1/2" Uni-Nut Retainer For 1.90" Housings

Part Number: 89-371-1041


1-1/2" Uni-Nut Retainer For 1.90" Housings

Part Number: 89-371-1043

 

TAIL PIECES


1.5" Tailpiece w/ O-ring For Split Nut


Part Number:
89-238-1020


Heater Union Half W/Split Nut 
1-1/2"Slip

Part Number:
89-395-1300


Heater Union Half W/Split Nut 1-1/2"Slip-2"Spigot

Part Number:
89-395-1302


Heater Union Half W/Split Nut
2"Slip

Part Number:
89-395-1304


O-Ring/Gasket, Waterway 1-1/2" Heater

Part Number:
90-423-1002


1.5" spigot Tailpiece w/o-ring for split nut
No O'Ring
Use 90-423-5229

Part Number:
89-238-1025


2" mpt Tailpiece w/O-ring For Split Nut
No O'Ring
Use 90-423-5229

Part Number:
89-238-1055


2" Tailpiece w/Gasket for Split Nut
No Gasket
Use 90-423-1002

Part Number:
89-238-1045

O-Ring, 2-3/8" ID, 1/8" Cross Section, Generic

Part Number:
90-423-5229

 

 


Item Retail Price Quantity
90-423-1002 - 1.5 Inch Heater O-Ring/Gasket - 711-4050 - 90-423-1002 - N $9.77 $5.45
90-423-5229 - O-Ring, Buna-N, 2-3/8 Inch ID, 1/8 Inch Cross Section, Generic - 90-423-5229 $9.74 $6.02
89-371-1059 - 2-1/2 Inch Uni-Nut Retainer For 3 Inch Housings SUB WITH PART 89-371-1055 - Replaced By Part 89-371-1055 - 86-02361 - 89-371-1059 $10.08 $6.11
89-238-1020 - 1.5 Inch Tailpc w/ O-ring For Split Nut - 417-4090 - UPC - 806105085412 - 89-238-1020 $10.36 $6.50
89-238-1045 - Tailpiece, 2 Inch bt x 2 Inch s, for Split Nut (Replaced By 89-110-1003 - Black w/ gasket) - 417-5050 - 89-238-1045 - N $11.40 $7.00
89-238-1015 - 1.5 Inch Split Nut - 121108015 - 89-238-1015 $11.73 $7.30
89-238-1017 - 1.5 Inch Split Nut Sm Flange (Fits Pump Tailpieces) - 121109015 - 89-238-1017 $11.73 $7.30
89-238-1044 - 2 Inch Split Nut for Heaters, w/Screws, Waterway - 400-5161 - 89-238-1044 - N $11.68 $7.44
89-238-1040 - 2 Inch Split Nut Union - 121108020 - UPC - 806105081858 - 89-238-1040 $12.42 $7.76
89-238-1012 - 1 1/2 Inch Heater Split Nut W/Screws,Waterway - 400-5491 - 89-238-1012 - N $12.29 $7.82
89-238-1055 - 2 Inch mpt Tailpiece For Sol/Split Nut (NO O'ring. Use part 90-423-5229) - 417-5140 - UPC - 806105085757 - 89-238-1055 $12.85 $8.23
89-238-1042 - 2 1/2 Inch Split Nut, For 3 inch Heaters - 121108025 - 89-238-1042 - N $26.32 $16.49
89-395-1300 - Heater Union Half W/Split Nut 1-1/2 Inch Slip - 0611-15 - 89-395-1300 $28.55 $17.95
89-395-1302 - Heater Union Half W/Split Nut 1-1/2 Inch Slip-2 Inch Spig - 0611-18 - 89-395-1302 $29.42 $18.54
89-395-1304 - Heater Union Half W/Split Nut 2 Inch Slip - 0611-20 - 89-395-1304 $29.82 $18.79

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