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Plastic Socket Couplings

Fernco 1059-44 socket coupling joining 4 inch PVC pipe to the hub of a PVC tee on a block basement wall
 
Plastic socket couplings · 1059 & 1060

Socket Couplings

When you can’t glue it, clamp it. Socket couplings connect straight to a PVC or ABS fitting hub, so you can tie in cast iron, work in tight spots and change pipe size right at the hub.

For DWV and other non-pressure lines.

Find your coupling Where to buy
Made in the USA 1½″ to 4″ PVC and ABS hubs Fits cast iron pipe
 
Two ways it connects

Hub to pipe, or hub to hub.

A PVC or ABS fitting hub is bigger on the outside than the pipe glued into it, so a standard coupling won’t fit over it. Socket couplings are sized to clamp over the hub.

Fernco 1059-44 socket coupling joining 4 inch PVC pipe to the hub of a PVC sanitary tee
1059 Series

Socket to pipe

A stepped body. The large end clamps over a plastic fitting hub. The small end clamps over plastic or cast iron pipe.

  • PVC or ABS Schedule 40 pipe
  • No-hub, service weight or extra heavy cast iron pipe
  • 1½″, 2″, 3″ and 4″, plus reducing sizes
Fernco 1060-150 socket coupling joining the hubs of two PVC elbows
1060 Series

Socket to socket

A straight body that clamps over two plastic fitting hubs. For two fittings with no pipe between them.

  • PVC or ABS fitting hubs
  • Joins fittings end to end
  • 1½″, 2″, 3″ and 4″
Where it works

When you can’t glue it.

Clamp onto the fitting that’s already there. No glue, no primer and no cutting the fitting out.

Close-up of a Fernco socket coupling with stainless steel clamps joining PVC pipe to the hub of a PVC tee
Cast iron

Two systems meet

Tying new PVC or ABS into an old cast iron line? Clamp the cast iron pipe straight onto the new fitting’s hub. One part instead of a coupling and a short piece of PVC.

Cramped

No room to work

Fitting up against a joist or inside a wall? It only needs room to slide on and tighten the clamps. Trim it to 3″ or 2″ at the molded grooves.

Reducing

Change size at the hub

Going from a 4″ fitting to 2″ or 3″ pipe? A reducing 1059 does it in one part.

Hub to hub

No pipe between

Two fittings end to end? The 1060 clamps over both hubs.

Socket couplings are for DWV and other non-pressure lines. Not for pressure systems such as potable water.

Size finder

Find your coupling.

Choose the fitting hub size, then what it connects to.

The hub is the socket end of the fitting, where the pipe glues in. Hub sizes vary a little by maker, so if you’re not sure, measure across the outside of the hub and check it against the table below.

Fernco 1059-44 plastic socket coupling

Pick a hub size and what it connects to, and your part number shows here.

PartConnectsHub end O.D.Other end O.D.Common fit
1059-1501½″ hub to 1½″ pipe2.09–2.39″1.80–2.05″1½″ PVC or ABS pipe, 1½″ no-hub cast iron pipe
1059-222″ hub to 2″ pipe2.44–2.87″2.14–2.50″2″ PVC or ABS pipe, 2″ cast iron pipe
1059-333″ hub to 3″ pipe3.68–4.21″3.26–3.78″3″ PVC or ABS pipe, 3″ cast iron pipe
1059-444″ hub to 4″ pipe4.54–5.28″4.11–4.73″4″ PVC or ABS pipe, 4″ cast iron pipe
1060-1501½″ hub to 1½″ hub1.93–2.37″1.93–2.37″Two 1½″ PVC or ABS fitting hubs
1060-222″ hub to 2″ hub2.10–2.80″2.10–2.80″Two 2″ PVC or ABS fitting hubs
1060-333″ hub to 3″ hub3.34–4.15″3.34–4.15″Two 3″ PVC or ABS fitting hubs
1060-444″ hub to 4″ hub4.38–5.20″4.38–5.20″Two 4″ PVC or ABS fitting hubs
1059-2/1502″ hub to 1½″ pipe2.69″1.90″Reducing
1059-323″ hub to 2″ pipe3.99″2.38″Reducing
1059-424″ hub to 2″ pipe5.01″2.38″Reducing
1059-434″ hub to 3″ pipe5.01″3.38″Reducing

O.D. ranges from Fernco product data. Pipe O.D.s used in the finder: Schedule 40 PVC and ABS (IPS), no-hub cast iron (CISPI 301), and service weight and extra heavy cast iron (ASTM A74). Standard part numbers link to dimensional drawings.

Why a socket coupling

Slide it on. Tighten it down.

A flexible PVC body and two stainless steel clamps. No glue, no primer, and the fitting you’re tying into stays right where it is.

Sized for the hubThe hub end is made to fit over the outside of a PVC or ABS fitting hub. On the 1059, the other end steps down to fit the pipe.
Flexible PVC body60 Shore A flexible PVC that conforms to ASTM D5926 and C1173. Rated from −30°F to 140°F and tested to 4.3 psi.
Stainless steel clampsTwo 300 series stainless steel clamps, tightened to 60 in-lb. The grooves hold the clamps when you cut the coupling down to 3″ or 2″.

Specifications.

Specification data
MaterialFlexible PVC, 60 Shore A
StandardsComplies with ASTM D5926, C1173 and CSA B602
Clamps300 series stainless steel
Installation torque60 in-lb
Test pressure4.3 psi
Temperature−30°F to 140°F
LengthAbout 4″. Can be cut down to 3″ or 2″.
Made inUSA. AIS and BABA compliant.
Where to use it
SystemsDWV and other non-pressure lines
Hub endPVC or ABS fitting hubs
1059 pipe endPVC or ABS Schedule 40 pipe, or cast iron pipe (no-hub, service weight or extra heavy)
1060PVC or ABS fitting hub on both ends
Sizes1½″, 2″, 3″ and 4″, plus 1059 reducing sizes
Not for pressure systems. Do not use socket couplings on pressurized lines such as potable water supply.

Documents.

The catalog page, installation sheet and dimensional drawings for Plastic Socket Couplings.

Fernco Plumbing CatalogCatalog · page 15View catalog Plastic Socket CouplingsInstallation sheetView 1059-150Dimensional drawing · 1½″ hub to 1½″ pipeDownload PDF 1059-22Dimensional drawing · 2″ hub to 2″ pipeDownload PDF 1059-33Dimensional drawing · 3″ hub to 3″ pipeDownload PDF 1059-44Dimensional drawing · 4″ hub to 4″ pipeDownload PDF 1060-150Dimensional drawing · 1½″ hub to 1½″ hubDownload PDF 1060-22Dimensional drawing · 2″ hub to 2″ hubDownload PDF 1060-33Dimensional drawing · 3″ hub to 3″ hubDownload PDF 1060-44Dimensional drawing · 4″ hub to 4″ hubDownload PDF

Frequently asked questions.

Why won’t a standard coupling fit over a fitting?

The hub on a PVC or ABS fitting is bigger on the outside than the pipe. 2″ pipe is 2.375″ O.D., but a 2″ fitting hub is closer to 2.7″. Socket couplings are sized to clamp over the hub.

Which do I need, the 1059 or the 1060?

If the other side is pipe, use the 1059. If the other side is another fitting hub, use the 1060. The size finder picks the part for you.

Does the 1059 fit cast iron?

Yes. The pipe end fits no-hub, service weight and extra heavy cast iron pipe in 2″, 3″ and 4″, and no-hub cast iron pipe in 1½″. It’s a direct way to tie existing cast iron into a new PVC or ABS fitting, especially where there’s no room for a coupling and a short piece of pipe.

Does it work with ABS?

Yes. Socket couplings fit PVC and ABS DWV fitting hubs, and the 1059 pipe end fits PVC and ABS Schedule 40 pipe.

Do I have to get the old pipe out of the hub?

No. The coupling clamps over the outside of the hub, so the piece glued inside can stay.

Can I use it in a tight spot?

Yes. It comes about 4″ long, and you can trim it to 3″ or 2″ at the molded grooves. On the shorter length, the stainless steel clamps sit in the grooves.

Can I go from a bigger fitting to smaller pipe?

Yes. Reducing 1059s connect a 2″ hub to 1½″ pipe, a 3″ hub to 2″ pipe, and a 4″ hub to 2″ or 3″ pipe. The size finder lists them under each hub size.

Can I use it on a water supply line?

No. Socket couplings are for DWV and other non-pressure lines only. Never use them on a pressurized line such as a potable water supply.