ONE-LOK SLDE wedge-action gland with blue actuating bolts, face view

Photos show several sizes. Your size is in the item number.

Item # SLDE12 Questions and answers (5)

ONE-LOK SLDE

Wedge-action restraint for mechanical joints on ductile iron pipe.

View price list (PDF)

Rated 350 psi at 12 in., with a 2:1 minimum safety factor
UL listed and FM approved in applicable sizes
No special tools; breakaway bolt tops show when each wedge is set
See all specifications

Pipe size: 12 in.

Made: Import

Need BABA or AIS compliance? Pick Domestic.

Finish: Standard

Comes with: Gland only

Gland, wedges and actuating bolts.

Your distributor

SIGMA sells through waterworks distributors. Order with item # SLDE12.

Quote from SIGMA

Job location

Sends your quote list to the right regional team.

Quantity

Download the SLDE 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. SLDE.

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 gasketed joint apart. ONE-LOK SLDE holds it at the fitting: hardened wedges grip the pipe, the gland bolts to the fitting, and the joint stays together without a poured thrust block.

Highlights

One actuating bolt per wedge, so the grip is set wedge by wedge
Cam action lets the wedges bite harder as thrust builds
Allows deflection during installation and settlement afterward
Re-rounding feature on 30 in. and larger glands (optional on D-SLDE)

Documents

Specifications12 in.: 350 psi · 13.20 in. pipe OD · 8 wedge bolts · 29.0 lb

At 12 in.

Item number	SLDE12
Working pressure	350 psi
Safety factor	2:1 minimum
Joint deflection	5°
Ductile iron pipe OD	13.20 in.
Gland weight	29.0 lb

Installation at 12 in.

Wedge bolts (no. / size / torque)	8 / 7/8 in. / 75-90 ft-lb
T-bolts (no. / size / torque)	8 / 3/4 x 4 in. / 75-90 ft-lb
Gasket	MG-12
Tightening order	T-bolts, then wedge bolts, each in a star pattern
Tools	No special tools

Materials and standards

Gland, wedges and actuating bolts	ASTM A536 65-45-12 ductile iron
Wedge hardness	370 BHN minimum
T-bolts and nuts	High-strength, low-alloy steel to AWWA/ANSI C111/A21.11
Listings	UL listed and FM approved in applicable sizes
Steel pipe	4 to 12 in., Sch. 40 and heavier, with a transition gasket

Ordering

Made	Import
Finish	Standard
Comes with	Gland only
Sizes	3 to 64 in.
Price list	Import Restraint Products, effective 12/9/24, rev. 4/14/26

Every size and item number18 sizes, 3 to 64 in. · Import, standard, gland only · item numbers

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

ONE-LOK SLDE item numbers and catalog data by pipe size
Item #	Pressure	Pipe OD	Gasket	Gland wt.
SLDE3	350 psi	3.96 in.	TG-3	5.5 lb
SLDE4	350 psi	4.80 in.	MG-4	6.5 lb
SLDE6	350 psi	6.90 in.	MG-6	10.0 lb
SLDE8	350 psi	9.05 in.	MG-8	14.5 lb
SLDE10	350 psi	11.10 in.	MG-10	23.0 lb
SLDE12	350 psi	13.20 in.	MG-12	29.0 lb
SLDE14	350 psi	15.30 in.	MG-14	39.6 lb
SLDE16	350 psi	17.40 in.	MG-16	49.67 lb
SLDE18	250 psi	19.50 in.	MG-18	60.33 lb
SLDE20	250 psi	21.60 in.	MG-20	69.0 lb
SLDE24	250 psi	25.80 in.	MG-24	103.67 lb
SLDE30	250 psi	32.00 in.	MGS-30	158.67 lb
SLDE36	250 psi	38.30 in.	MGS-36	234.5 lb
SLDE42	250 psi	44.50 in.	MGS-42	344.0 lb
SLDE48	250 psi	50.80 in.	MGS-48	456.0 lb
SLDE54	250 psi	57.56 in.	MGS-54	1,045 lb
SLDE60	250 psi	61.61 in.	MGS-60	1,136 lb
SLDE64	250 psi	65.67 in.	MGS-64	1,258 lb

Catalog data is for the SLDE gland. Bolt counts and torque for your size are under Specifications.

Questions and answers5 questions buyers ask about SLDE

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. One submittal covers the model at every size, and D-SLDE has its own. The SLDE submittal is a fillable PDF, so you can type in your project before you send it. Every SIGMA submittal is also in the Submittals Library.

What do SLDE, SLDEP and SLDE-X mean?

SLDE is the gland with its wedges and actuating bolts. A "P" stands for "Pack" and adds the accessories (SLDEP). An X adds the CorrSafe e-coat (SLDE-X). A D- in front is the domestic version. The size comes next, and TT at the end adds the Teflon accessories (SLDEP12TT).

Is there a domestic version?

Yes. D-SLDE, 3 through 48 in., BABA and AIS compliant per its catalog. Pick Domestic above and the item number, specs, price list and submittal switch to it. It also has its own page.