ONE-LOK SLDEH harness on a push-on ductile iron pipe joint, catalog render

The first image is the SLDEH catalog render; the others show the SLDE gland it uses. Your size is in the item number.

Item # SLDEH12 Questions and answers (5)

ONE-LOK SLDEH

Harness for push-on joints on ductile iron pipe: an SLDE wedge gland on the spigot, tied by rods to a back-up ring behind the bell.

View price list (PDF)

Catalog pressure rating: 350 psi at 12 in.
Two-piece back-up ring with oblong ears to fit varying bell ODs, 3 to 42 in.
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: Harness

Per the catalog: an SLDE gland, a back-up ring, and restraining rods and nuts.

Your distributor

SIGMA sells through waterworks distributors. Order with item # SLDEH12.

Quote from SIGMA

Job location

Sends your quote list to the right regional team.

Quantity

Download the SLDEH submittal

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. SLDEH.

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 SLDEH holds it: an SLDE wedge-action gland grips the spigot, and high-strength, low-alloy rods tie it to a back-up ring seated behind the bell. The ring is a two-piece split ring through 42 in. and a C110 MJ gland at 48 in.

Highlights

High-strength, low-alloy steel restraining rods tie the gland to the ring
Contoured wedges spread the grip, protecting the pipe wall and cement lining
Cam action lets the wedges bite harder as thrust builds
Allows deflection during installation and settlement afterward, up to the listed deflection

Documents

Specifications12 in.: 350 psi · 15.38 in. max. bell OD · 76 lb

At 12 in.

Item number	SLDEH12
Working pressure	350 psi
Safety factor	2:1, per the September 2026 submittal
Joint deflection	5°
Max. pipe bell OD	15.38 in.
Harness weight	76 lb

Installation at 12 in.

Back-up ring clamping bolts (no. / size / torque)	2 / 3/4 x 3 in. / 65 ft-lb
Washer plates (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 SLDE wedge bolts in a star pattern, then rod nuts
Tools	No special tools

Materials and standards

Gland, back-up ring, wedges and actuating bolts	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, 65,000 psi tensile and 45,000 psi yield minimum
Side clamping bolts and nuts	ASTM A449 high-strength steel
UL listing, per the Feb 2021 catalog	350 psi at 3 to 14 in., 300 psi at 16 in., 250 psi at 18 to 30 in., 200 psi at 36 in.
FM approval, per the Feb 2021 catalog	175 psi at 4 to 12 in.
48 in. back-up ring	A C110 MJ gland in place of the split ring

Ordering

Made	Import
Finish	Standard
Comes with	Harness
Sizes	3 to 48 in.
Price list	Import Restraint Products, effective 12/9/24, rev. 4/14/26

Every size and item number15 sizes, 3 to 48 in. · Import, standard, harness · item numbers

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

ONE-LOK SLDEH item numbers and catalog data by pipe size
Item #	Pressure	Bell OD	Rods	Weight
SLDEH3	350 psi	5.44 in.	4 rods, 5/8 x 17 in., 8 nuts	12.9 lb
SLDEH4	350 psi	6.62 in.	4 rods, 3/4 x 17 in., 8 nuts	18.9 lb
SLDEH6	350 psi	8.62 in.	6 rods, 3/4 x 17 in., 12 nuts	29.5 lb
SLDEH8	350 psi	10.88 in.	6 rods, 3/4 x 17 in., 12 nuts	36.9 lb
SLDEH10	350 psi	13.12 in.	8 rods, 3/4 x 24 in., 16 nuts	52 lb
SLDEH12	350 psi	15.38 in.	8 rods, 3/4 x 24 in., 16 nuts	76 lb
SLDEH14	350 psi	17.88 in.	6 rods, 3/4 x 24 in., 12 nuts	95 lb
SLDEH16	350 psi	20.12 in.	6 rods, 3/4 x 24 in., 12 nuts	115 lb
SLDEH18	250 psi	22.38 in.	8 rods, 3/4 x 24 in., 16 nuts	144 lb
SLDEH20	250 psi	24.62 in.	8 rods, 3/4 x 24 in., 16 nuts	201 lb
SLDEH24	250 psi	29.12 in.	10 rods, 3/4 x 30 in., 20 nuts	223 lb
SLDEH30	250 psi	35.75 in.	10 rods, 1 x 30 in., 20 nuts	360 lb
SLDEH36	250 psi	42.62 in.	12 rods, 1 x 30 in., 24 nuts	508 lb
SLDEH42	250 psi	49.37 in.	12 rods, 1 1/4 x 48 in., 24 nuts	835 lb
SLDEH48	250 psi	56.12 in.	28 rods, 1 1/4 x 48 in., 56 nuts	1351 lb

Catalog data is for the full harness. Clamping bolts, washer plates and torque for your size are under Specifications. E-coat runs 3 to 42 in.

Questions and answers5 questions buyers ask about SLDEH

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 submittal?

Below the Add to quote list button. The SLDEH submittal has the ratings, dimensions and harness parts by size; the SLDEH catalog, under Documents, has the sample specification and the install steps. Posted SIGMA submittals are also in the Submittals Library.

What makes up an SLDEH?

An SLDE wedge-action gland for the spigot, a two-piece split back-up ring for behind the bell, and high-strength, low-alloy restraining rods with nuts. Washer plates come with the larger sizes; Specifications lists them by size. At 48 in. the back-up ring is a C110 MJ gland.

SLDEH or SSLDH?

SLDEH goes on as the joint is assembled: the one-piece SLDE gland slides onto the plain end first. SSLDH uses a split wedge gland, so it fits push-on joints already in the line.