ONE-LOK SSLDH split bell harness on a push-on ductile iron pipe joint, catalog render

Renders from the SSLDH and SSLD catalogs. Your size is in the item number.

Item # SSLDH12 Questions and answers (5)

ONE-LOK SSLDH

Split harness for existing push-on bell joints on ductile iron pipe.

View price list (PDF)

Catalog pressure rating: 300 psi at 12 in.
Gland and back-up ring both split, for upgrades and tie-ins to existing lines
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 harness

Per the catalog: a split ONE-LOK gland, a two-piece back-up ring, and all-thread rods and nuts.

Your distributor

SIGMA sells through waterworks distributors. Order with item # SSLDH12.

Quote from SIGMA

Job location

Sends your quote list to the right regional team.

Quantity

Download the SSLDH 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. SSLDH.

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 push-on joint apart. ONE-LOK SSLDH restrains joints already in the line: a split ONE-LOK wedge gland grips the spigot, and all-thread rods tie it to a two-piece back-up ring that seats against the bell. Both rotate, so the rods line up easily.

Highlights

For upgrades and tie-ins to lines that were not properly restrained when they went in
Gland and back-up ring rotate for easy rod alignment
Contoured wedges spread the grip, protecting the pipe wall and cement lining
Cam action lets the wedges bite harder as thrust builds

Documents

Specifications12 in.: 300 psi · 15.38 in. pipe bell OD · 78.7 lb

At 12 in.

Item number	SSLDH12
Max. pressure rating	300 psi
Rating basis	Catalog table. The sample specification calls for a rating equal to the pipe joint's working pressure.
Joint deflection	5°
Pipe bell OD	15.38 in.
Harness weight	78.7 lb

Installation at 12 in.

Back-up ring clamping bolts (no. / size / torque)	2 / 3/4-10 UNC x 3.00 in. / 65 ft-lb
Washers (no. / size)	None at this size
Rods and nuts (no. / size)	8 rods, 3/4 x 24 in., 16 nuts
Installation order	Back-up ring bolts, then the gland and rods, 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
Two-piece back-up ring	ASTM A536 65-45-12 ductile iron
Wedge hardness	370 BHN minimum
Restraining rods and nuts	High-strength, low-alloy steel to AWWA/ANSI C111/A21.11
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

Ordering

Made	Import
Finish	Standard
Comes with	Split harness
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 harness · item numbers

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

ONE-LOK SSLDH item numbers and catalog data by pipe size
Item #	Pressure	Bell OD	Rods	Weight
SSLDH4	350 psi	6.62 in.	4 rods, 3/4 x 17 in., 8 nuts	22.5 lb
SSLDH6	350 psi	8.62 in.	6 rods, 3/4 x 17 in., 12 nuts	32.5 lb
SSLDH8	350 psi	10.88 in.	6 rods, 3/4 x 17 in., 12 nuts	39.9 lb
SSLDH10	300 psi	13.12 in.	8 rods, 3/4 x 24 in., 16 nuts	55 lb
SSLDH12	300 psi	15.38 in.	8 rods, 3/4 x 24 in., 16 nuts	78.7 lb
SSLDH14	300 psi	17.88 in.	6 rods, 3/4 x 24 in., 12 nuts	109.8 lb
SSLDH16	300 psi	20.12 in.	6 rods, 3/4 x 24 in., 12 nuts	161.5 lb
SSLDH18	250 psi	22.38 in.	8 rods, 3/4 x 24 in., 16 nuts	182.1 lb
SSLDH20	250 psi	24.62 in.	8 rods, 3/4 x 24 in., 16 nuts	221 lb
SSLDH24	250 psi	29.12 in.	10 rods, 3/4 x 30 in., 20 nuts	284 lb
SSLDH30	250 psi	35.75 in.	10 rods, 1 x 30 in., 20 nuts	482 lb
SSLDH36	250 psi	42.62 in.	12 rods, 1 x 30 in., 24 nuts	600 lb

Catalog data is for the full split harness. The catalog also lists 42 in. at 200 psi, which is not on the current price list. Call 800.999.2550 for it.

Questions and answers5 questions buyers ask about SSLDH

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 SSLDH spec sheet (November 2026): materials, sizes, pressure ratings, coating and deflection. The SSLDH catalog has the dimensions, the sample specification and the install steps. Posted SIGMA submittals are in the Submittals Library.

When do I use SSLDH?

To restrain a push-on bell joint that is already in the line. The gland and the back-up ring both come in two pieces, so they fit around pipe already in place. It suits upgrades and tie-ins to lines that were not properly restrained when they went in.

SSLDH or SLDEH?

SSLDH is for existing push-on joints. For new work, SLDEH uses a one-piece SLDE gland that slides onto the spigot as the joint goes together.

What is it rated for?

The catalog table lists 350 psi at 4 to 8 in., 300 psi at 10 to 16 in. and 250 psi at 18 to 36 in. Its sample specification calls for a rating equal to the working pressure of the pipe joint it restrains. The catalog also lists 42 in. at 200 psi; it is not on the current price list, so call 800.999.2550.