ONE-LOK SSLD split wedge-action gland on ductile iron pipe, catalog render

Render from the SSLD catalog. Your size is in the item number.

Item # SSLDP12 Questions and answers (5)

ONE-LOK SSLD

Split wedge-action MJ restraint for existing installations of ductile iron pipe and fittings.

View price list (PDF)

Rated 350 psi at 12 in., with a 2:1 minimum safety factor
Two halves close around pipe that is already in place
No special tools; breakaway bolt tops show when each wedge is set
See all specifications

Pipe size: 12 in.

Made: Import

Finish: Standard

Comes with: Split gland with accessories

One item number (SSLDP) for the split gland and its accessories.

Your distributor

SIGMA sells through waterworks distributors. Order with item # SSLDP12.

Quote from SIGMA

Job location

Sends your quote list to the right regional team.

Quantity

Download the SSLD spec sheet

Need help on the job?

Call 800.999.2550. Real people answer, mid-job too.

Right restraint? Selection Tool How far to restrain? Calculator

Everything about the 12 in. SSLD.

Details, specs, every size and the questions buyers ask. Open what you need.

Product detailsWhat it does, highlights and documents

About this product

Water under pressure pushes a mechanical joint apart. ONE-LOK SSLD restrains joints already in the line: the gland comes in two halves that close around the pipe, bolt together at side brackets, and bolt to the fitting.

Highlights

Split gland for existing ductile iron pipe and fitting assemblies
Extra-long T-bolts through the side brackets hold the halves together
Contoured wedges spread the grip, protecting the pipe wall and cement lining
Cam action lets the wedges bite harder as thrust builds
Pipe re-rounding feature available at 24, 42 and 48 in.

Documents

Specifications12 in.: 350 psi · 13.20 in. pipe OD · 8 break-off bolts · 45.00 lb

At 12 in.

Item number	SSLDP12
Working pressure	350 psi
Safety factor	2:1 minimum
Joint deflection	5°
Ductile iron pipe OD	13.20 in.
Gland weight	45.00 lb

Installation at 12 in.

Break-off bolts (no. / size / torque)	8 / 7/8 in. / 75-90 ft-lb
T-bolts (no. / size / torque)	6 / 3/4 x 4.0 in. / 75-90 ft-lb, plus 2 extra-long 3/4 x 6 in. through the brackets
Gasket (split SIGMASEAL)	MGS12
Tightening order	T-bolts evenly, starting next to a bracket, then break-off bolts in a star pattern
Tools	No special tools

Materials and standards

Gland, brackets, wedges and actuating bolts	ASTM A536 65-45-12 ductile iron
Wedge hardness	370 BHN minimum
T-head bolts and nuts	High-strength, low-alloy steel to AWWA/ANSI C111/A21.11, 65,000 psi tensile and 45,000 psi yield minimum
Joint dimensions	Compatible with AWWA C111/ANSI A21.11 and AWWA C153/ANSI A21.53 mechanical joints

Ordering

Made	Import
Finish	Standard
Comes with	Split gland with accessories
Sizes	4 to 36 in.
Price list	Import Restraint Products, effective 12/9/24, rev. 4/14/26

Every size and item number12 sizes, 4 to 36 in. · Import, standard, split gland with accessories · item numbers

Showing Import, standard, split gland with accessories. Item numbers follow the options above. Pick a size to load it.

ONE-LOK SSLD item numbers and catalog data by pipe size
Item #	Pressure	Pipe OD	Gasket	Gland wt.
SSLDP4	350 psi	4.80 in.	MGS4	19.00 lb
SSLDP6	350 psi	6.90 in.	MGS6	25.00 lb
SSLDP8	350 psi	9.05 in.	MGS8	32.00 lb
SSLDP10	350 psi	11.10 in.	MGS10	40.00 lb
SSLDP12	350 psi	13.20 in.	MGS12	45.00 lb
SSLDP14	350 psi	15.30 in.	MGS14	62.17 lb
SSLDP16	350 psi	17.40 in.	MGS16	97.11 lb
SSLDP18	250 psi	19.50 in.	MGS18	99.94 lb
SSLDP20	250 psi	21.60 in.	MGS20	110.04 lb
SSLDP24	250 psi	25.80 in.	MGS24	162.71 lb
SSLDP30	250 psi	32.00 in.	MGS30	293.41 lb
SSLDP36	250 psi	38.30 in.	MGS36	388.50 lb

Catalog data is for the SSLD split gland. The catalog also lists 42 and 48 in., which are not on the current price list. Call 800.999.2550 for those.

Questions and answers5 questions buyers ask about SSLD

Where do I find the price?

On SIGMA's price lists. Where an item is on a posted list, the View price list button near the top of this page opens it, and every posted list is on the Price Lists page. SIGMA sells through waterworks distributors, and your distributor sets your price. For contract pricing, ask your regional team.

Where is the spec sheet?

The button below Add to quote list opens the SSLD spec sheet (November 2026): materials, sizes, pressure ratings, coating and deflection. The SSLD catalog has the dimensions, the sample specification and the install steps. Posted SIGMA submittals are in the Submittals Library.

When do I use SSLD?

When the mechanical joint is already in the line. The SSLD gland comes in two halves that close around the pipe, so it restrains existing ductile iron pipe and fitting assemblies. For new work, see the solid ONE-LOK SLDE.

Which gasket goes with it?

A split SIGMASEAL gasket: MGS plus the size, such as MGS12. If the existing gasket has to be replaced, clean and lubricate, field cut the SIGMASEAL at a 45 degree angle and seat it firmly in the fitting.

What about 42 and 48 in.?

The SSLD catalog lists 42 and 48 in., rated 200 and 175 psi, with a pipe re-rounding feature available. They are not on the current price list. Call 800.999.2550 for those sizes.