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Item # DMCPEP12 Questions and answers (4)

SIGMA MJ Connector

A ductile iron MJ x MJ connector, 3 to 36 in., that bolts two mechanical joint bells together, such as an MJ valve and an MJ fitting. Each kit includes the connector, two MJ gaskets, T-head bolts, eye bolts where the size takes them, and T-head spacers. Pick the size and the accessory pack.

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Rated 350 psi water working pressure at 12 in.
Ductile iron per ASTM A536 Grade 65-45-12, e-coated inside and outside
Every connector heat coded for traceability
See all specifications

Size: 12 in.

Made: Import

Listed on the Import MJ Connector price list.

Accessory pack: Standard pack

T-head bolts, and eye bolts where the size takes them, in low-alloy, corrosion-resistant, high-strength steel per ANSI/AWWA C111/A21.11.

Your distributor

SIGMA sells through waterworks distributors. Order with item # DMCPEP12.

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Job location

Sends your quote list to the right regional team.

Quantity

Download the MJ Connector submittal

Need help on the job?

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

Everything about the 12 in. MJ x MJ connector.

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

Product detailsWhat it is, highlights and documents

About the MJ Connector

The SIGMA MJ Connector joins two mechanical joint bells, such as an MJ valve and an MJ fitting, with no pipe between them. Its compact design gives a bolt-through restraint option when space is limited, and the two joints are connected with one accessory kit instead of two.

Close-coupled connections can be put together before the parts go to the job site. Use the standard accessory pack with C153 compact fittings and valves. Full body C110 fittings and some butterfly valves with thick bolt flanges take a long-bolt pack: ask your regional team for it.

Highlights

350 psi water working pressure through 24 in., 250 psi at 30 and 36 in.
Meets the working pressure of ANSI/AWWA C153/A21.53 and ANSI/AWWA C110/A21.10 fittings
Bolt counts and weights with the accessory pack in the catalog

Documents

Specifications12 in. MJ x MJ connector · 350 psi

12 in. MJ x MJ connector

Item number	DMCPEP12
Fitting	Connectors, MJ x MJ connector
Size	12 in.
Made	Import
Coating	Standard pack
Water working pressure	350 psi
Max. MJ joint deflection
Weight, with accessory pack	45.35 lb
Crate quantity
Catalog page	Page 2 of the MJ Connector catalog
Price list	Import MJ Connector, effective 12/9/24

Materials

Connector and spacers	Ductile iron, ASTM A536 Grade 65-45-12
Coating	E-coat inside and outside
Gaskets	SBR per ANSI/AWWA C111/A21.11; EPDM, nitrile and neoprene also available
T-head bolts and eye bolts	Low-alloy, corrosion-resistant, high-strength steel per ANSI/AWWA C111/A21.11; Type 304 or Type 316 stainless steel and blue fluoropolymer-coated bolts also available

Standards and testing

Made per	ANSI/AWWA C153/A21.53 and ANSI/AWWA C110/A21.10
Fits	Mechanical joints per ANSI/AWWA C111/A21.11, C110/A21.10 and C153/A21.53
Certified	NSF 61
Sizes	3 to 36 in.
Traceability	Every connector is heat coded

Installation

Before you begin	Match the accessory pack to the fittings and valves; for hydrants, make a trial connection first
Eye bolts	None at 3, 4 and 14 to 36 in.; one on each side of the valve at 6 and 8 in.; two on each side at 10 and 12 in.
Torque	45 to 60 ft-lbs at 3 in.; 75 to 90 ft-lbs at 4 to 24 in.; 100 to 120 ft-lbs at 30 and 36 in., in an alternating pattern

Weights include the accessory pack, per the MJ Connector submittal (October 2026). Installation steps and torque are in the installation instructions under Documents.

Every size and item number13 sizes of the MJ x MJ connector · Import, Standard pack · item numbers

Showing the MJ x MJ connector, Import, Standard pack. Item numbers follow the options above. Pick a size to load it.

MJ Connector: item numbers and catalog data by size
Item #	Pressure	Weight
DMCPEP3	350 psi	11.33 lb
DMCPEP4	350 psi	14.82 lb
DMCPEP6	350 psi	24.98 lb
DMCPEP8	350 psi	28.17 lb
DMCPEP10	350 psi	43.59 lb
DMCPEP12	350 psi	45.35 lb
DMCPEP14	350 psi	71.49 lb
DMCPEP16	350 psi	83.81 lb
DMCPEP18	350 psi	104.66 lb
DMCPEP20	350 psi	108.22 lb
DMCPEP24	350 psi	134.21 lb
DMCPEP30	250 psi	202.47 lb
DMCPEP36	250 psi	253.76 lb

Weights include the accessory pack, per the MJ Connector catalog.

Questions and answers4 questions buyers ask about the MJ Connector

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.

What comes in the kit?

One MJ x MJ connector, two SBR mechanical joint gaskets, T-head bolts with nuts, eye bolts where the size takes them, and T-head spacers. The catalog lists the counts for each size.

Which accessory pack do I need?

Match it to the fittings and valves. The standard pack is for C153 compact fittings and valves. Full body C110 fittings and some butterfly valves with thick bolt flanges take a long-bolt pack: ask your regional team for it. Type 304 and 316 stainless steel and blue fluoropolymer packs are on the price list too.

What do the eye bolts and spacers do?

The eye bolt's shape makes it easier to bolt the connector to some wide-bodied valves. The T-head spacer raises the nut so it does not hit the fitting when you tighten it.