Waterway 2.5" Heater Union Gasket, 711-6020 In stock$5⁹⁹

Waterway 711-6020 2.5 inch heater union gasket

Waterway 2.5" Heater Union Gasket, 711-6020

Name: Waterway 2.5" Heater Union Gasket, 711-6020
Brand: Waterway
SKU: WWP-151-6020
Price: 5.99 USD
Availability: InStock

Ask a questionMPN 711-6020

$5⁹⁹

In stock

Get volume pricing Request a quote

30 day returns · Easy, with prepaid labels provided

Quick overview

Genuine Waterway Factory gasket 711-6020, cut to the dimensions the union was designed for.
For the 2.5 inch union Sized to the 2.5 inch heater union, not the smaller 2 inch fitting.
Seals the heater connection Sits between the union halves so tightening the nut makes a watertight joint.
The usual cause of a dripping union A flattened or hardened gasket keeps weeping no matter how hard the nut is turned.
No tools needed The union nut backs off by hand or with a strap wrench, and the gasket lifts straight out.
Worth stocking A cheap part that saves a service call when a heater is opened up or reinstalled.

Full description and specifications ↓

Need a hand?

Bilingual support from pool professionals.

(888) 751-8084Call Chat with a techChat Email usEmail

Frequently bought together

Current item Select Waterway 2.5" Heater Union Gasket, 711-6020

Waterway

2.5" Heater Union Gasket, 711-6020

$5⁹⁹

Select

Waterway

2" Heater O-Ring/Gasket, 711-4030

$4⁹⁹

Select

Waterway

400-5161B 2" Split Nut for 2012 Heater

$7⁹⁹

Select

Raypak

Genuine OEM Protek Shield Module Assembly, 017960F

$50⁹⁹

Select

Raypak

Heat Pump Digital Control Board 9350/9353 5450-8450, 100-10000347

$296⁹⁹

Select

Hayward

Heat Exchanger Assembly for H250FD, FDXLHXA1250

$1,102⁹⁹

Select

Pentair

Genuine OEM MasterTemp/Max-E-Therm 6-Button Control Board Kit, 461105Z

$539⁹⁹

Subtotal

Similar products

Other products people compare with this one.

Balboa Heater O-Ring 2", 21619$5⁹⁹

Pentair 70951 tube seal gasket for MiniMax pool heaters

Pentair Tube Seal Gasket, 70951$6⁹⁹

Teledyne Laars P0026800 return header drain plug for pool heaters

Teledyne Laars Return Header Drain Plug, P0026800$6⁹⁹

Coates 20005061 threaded heating element 5.5kW 240V with gasket

Coates Electric Heater 5.5kW 240V Threaded Element with Gasket, 20005061$68⁹⁹

Sta-Rite 77707-0011 blower and adapter plate gasket kit for Max-E-Therm and MasterTemp

Sta-Rite Adapter Plate Gasket Kit for Max-E-Therm and MasterTemp Heater Burner System, 77707-0011$77⁹⁹

Raypak 11kW Electric Heater Element Kit with Gasket | 001802F$177⁹⁹

Coates Heater 9kW Element 240V with 4-Bolt Flange & Gasket | 20006039$275⁹⁹

Coates Heater 6kW Element 240V with 4-Bolt Flange & Gasket | 20006046$275⁹⁹

Coates Heater 9kW Elemment 480V with 4-Bolt Flange & Gasket | 20006049$275⁹⁹

Coates Heater 6kW Element 480V 4-Bolt Flange & Gasket | 20006056$280⁹⁹

Coates 20006004 15kW 208V heater element with 4 bolt flange and gasket

Coates 15kW Heater Element, 208V with 4 Bolt Flange and Gasket, 20006004$323⁹⁹

Coates Heater 12kW Element 480V 4-Bolt Flange & Gasket | 20006015$323⁹⁹

Coates Heater Company, Inc. 18kW Element 480V with 4-Bolt Flange & Gasket | 200060 | 20006017

Coates Heater Company, Inc. 18kW Element 480V with 4-Bolt Flange & Gasket | 20006017$323⁹⁹

Coates Heater 18kW Element 208V with 4-Bolt Flange & Gasket | 200060 | 20006005

Coates Heater 18kW Element 208V with 4-Bolt Flange & Gasket | 20006005$323⁹⁹

Coates Heater 15kW Element 240V with 4-Bolt Flange & Gasket | 20006 | 20006010

Coates Heater 15kW Element 240V with 4-Bolt Flange & Gasket | 20006010$323⁹⁹

Coates Heater 18kW Element 240V with 4-Bolt Flange & Gasket | 200060 | 20006011

Coates Heater 18kW Element 240V with 4-Bolt Flange & Gasket | 20006011$337⁹⁹

SuperPro SP0121108020 two inch split nut with screws for heater repair

SuperPro 2" Split Nut with Screws for Heater Repair, SP0121108020$9⁹⁹

Thermcore Products 86-02370 uni-nut for a 3 inch heater tube

Thermcore Products Uni-Nut for 3" Heater Tube, 86-02370$11⁹⁹

Zodiac BYPASS VALVE GASKET HI-E2 | R0011400$11⁹⁹

Coates Heater Pilot Switch Rocker | 240V | 23001521$14⁹⁹

Product details

This is the genuine Waterway 711-6020 gasket for the 2.5 inch heater union. It is the flat seal that sits between the two halves of the union, and it is what actually makes the joint watertight when the nut is tightened.

Why a union leaks

A union does not seal on its threads. The nut simply pulls the two faces together and squeezes the gasket between them. That gasket spends its life compressed, warm and wet, and over a few seasons it hardens and takes the shape it was squeezed into. When that happens it can no longer close the gap, and the joint drips. Tightening harder is the natural response and the wrong one, because it distorts the nut and the seating face without improving the seal.

Fitting

Drain the line, back the union nut off, and lift the old gasket out of its seat. Clean any grit or old debris off both faces, drop the new gasket in flat, and tighten the nut by hand. Do not add tape or thread paste, which belongs on threaded pipe joints and not on a union.

Before you order

Check the size. This is the 2.5 inch gasket, and a 2 inch union takes a different part.

Specifications
Brand	Waterway
Manufacturer part number	711-6020
UPC	806105124906
Type	Union gasket
Size	2.5 inch
Application	Heater union
Ships	Parcel

Request a quote

Need a volume price, a freight quote, or pricing in writing before you order? We reply the same business day.

Request a quote

From Waterway

Waterway equipment

Waterway Power Defender Variable Speed Pump 1.65HP 230V, PD-165

Waterway 150 Sq. Ft. 1.5 HP 2 Speed Clearwater Cartridge Filter System, 522-5167-6S

Waterway Complete Renegade Vinyl Skimmer, Wide Mouth, 9 in. Throat, White, 540-8500

Waterway 3/4 HP Booster Pump, SG3810430-1PDA

Shop Waterway equipment

Waterway parts

Waterway Renegade Pool Skimmer Basket, 542-3240

Waterway 6 in. Pump Trap Assembly, 2 in. x 2 in. Ports, 310-6600

Waterway Adjustable Spa Jet, Gunite, 210-3400

Waterway Poly Gunite Jet Assembly 1.5" x 2" Tee Body, 210-3700

Shop Waterway parts

Waterway makes pumps, filters, skimmers, jets, valves and fittings for pools, spas and baths.Shop all Waterway

Customer reviews

More from Waterway

Waterway 550-4407 Crystal Water filter tank body, gray, with label

Waterway Tank Body, Crystal Water, Gray, with Label, 550-4407$456⁹⁹

Waterway 310-6600 6 in. pump trap assembly with 2 in. x 2 in. ports, front view

Waterway 6 in. Pump Trap Assembly, 2 in. x 2 in. Ports, 310-6600$70⁹⁹

Waterway 550-0701B lock ring for Pro Clean Plus 125 and 150 sq ft filters

Waterway Lock Ring, Pro Clean Plus, 550-0701B$90⁹⁹

Waterway 522-5167-6S ClearWater II 150 sq. ft. cartridge filter system with 1.5 HP Hi-Flo II two speed pump

Waterway 150 Sq. Ft. 1.5 HP 2 Speed Clearwater Cartridge Filter System, 522-5167-6S$899⁹⁹

Waterway ClearWater II 520-5147-6S 100 sq ft cartridge filter system with 1.5 HP pump

Waterway 100 SqFt ClearWater II Cartridge Filter System for Above Ground Pool 1.5HP, 520-5147-6S$745⁹⁹

Waterway 542-3240 Renegade pool skimmer basket

Waterway Renegade Pool Skimmer Basket, 542-3240$21⁹⁹

Waterway 210-3700 poly gunite jet assembly with 1.5 inch by 2 inch tee body

Waterway Poly Gunite Jet Assembly 1.5" x 2" Tee Body, 210-3700$21⁹⁹

Waterway 210-3400 adjustable gunite spa jet

Waterway Adjustable Spa Jet, Gunite, 210-3400$31⁹⁹

Waterway 550-0621 tank lid with lock ring and pressure gauge for Pro Clean Plus 125 and 150 sq ft filters

Waterway Tank Lid with Lock Ring, Pro Clean Plus 125/150 sq ft, 550-0621$254⁹⁹

Waterway 218-1447 gray wall fitting escutcheon for vinyl liner pool returns

Waterway Wall Fitting Escutcheon, Gray, for In-Ground Vinyl Liner Return Fittings, 218-1447$6⁹⁹

Waterway 229-8127 thread-in 5-scallop twin roto Poly Storm gunite jet internal in gray

Waterway Thread-in 5-Scallop Twin Roto Poly Storm Gunite Jet Internal, Gray, 229-8127$19⁹⁹

Waterway 805-0000 Crystal Water filter tank o-ring

Waterway Crystal Water Tank O-Ring, 805-0000$32⁹⁹

Waterway 400-4030 1-1/2 inch union, male pipe thread by female slip

Waterway 1-1/2" x 1-1/2" S Union MPT, 400-4030$13⁹⁹

Waterway 540-8500 Renegade wide mouth vinyl liner skimmer, 9 in. throat, white

Waterway Complete Renegade Vinyl Skimmer, Wide Mouth, 9 in. Throat, White, 540-8500$162⁹⁹

Waterway 640-1900 V 10 inch Tru Flo cover and frame in white

Waterway 10" Tru Flo Cover and Frame, White, 640-1900 V$38⁹⁹

Waterway 505-1970 filter collar valve wrench for split-nut threaded sand filters

Waterway Filter Collar Valve Wrench, 505-1970$21⁹⁹

Waterway 210-6090 Roto Deluxe Jet in white

Waterway Roto Deluxe Jet, White, 210-6090$32⁹⁹

Waterway 600-9600 valve lid diverter assembly with spider gasket

Waterway Lid Diverter Assembly with Gasket, 600-9600$96⁹⁹

Waterway 400-5080 2 in. union, male pipe thread by female slip

Waterway 2" Union, Male Pipe Thread by Female Slip, 400-5080$13⁹⁹

Waterway 640-4740 V universal grate, 12 in. x 12 in., white

Waterway Universal Grate, 12 in. x 12 in., White, 640-4740 V$66⁹⁹

Questions and answers

What people ask about this product, answered by our pool techs.

Which union does this fit?

The 2.5 inch heater union. A 2 inch union takes a different gasket, so measure the union before ordering.

My union drips even when I tighten it hard. Will this fix it?

Usually. Once a union gasket has taken a set or gone hard, extra torque only distorts the nut and the seat. A fresh gasket seals with normal hand tightening.

Do I need thread sealant or tape?

No. A union seals on the gasket face, not on the threads. Adding tape or paste to a union thread makes it harder to tighten evenly and does nothing for the seal.

Should I replace both unions?

If the heater has a union at each end and they are the same age, changing both while the system is drained down saves opening it up again shortly afterwards.

Ask your own question