Mechanical joint and push-on hydrant buries, drawings from the SIGMA DBM and DBP spec sheets

Drawings from the spec sheets (October 2026). The item number sets the connection, drilling, coat and size.

Item # DBM636-6 Questions and answers (6)

Hydrant Buries

6 in. ductile iron fire hydrant buries, 6 x 16 to 6 x 54 in. Pick the connection, the drilling, the coat and the size.

View price list (PDF)

Mechanical joint, push-on and flanged
350 psi on the DBM, DBP and XBM spec sheets
See all specifications

Connection: Mechanical joint

Drilling: Los Angeles 6-hole

Size: 6 x 36 in.

Made: Ask your regional team

Lining and coating: Cement lined, asphaltic coat

Cement-mortar lining and an asphaltic seal coat (ANSI/AWWA C104), per the spec sheets.

Your distributor

SIGMA sells through waterworks distributors. Order with item # DBM636-6.

Quote from SIGMA

Job location

Sends your quote list to the right regional team.

Quantity

Download the DBM, DBP and XBM spec sheets

Need help on the job?

Call the Western regional team in Ontario, CA, at 800.688.6230 with the size, connection and drilling you need.

Hydrant extensions Spec sheets

Everything about this bury: 6 x 36 in.

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

Product detailsWhat it is, highlights and documents

About hydrant buries

A hydrant bury is the 90 degree bend that turns the line from the main up toward a wet-barrel fire hydrant. SIGMA's 6 in. ductile iron buries come mechanical joint, push-on or flanged, from 6 x 16 to 6 x 54 in., cement lined, with an asphaltic or fusion bonded epoxy coat. A hydrant extension bolts to the top flange.

Per their spec sheets, the DBM and DBP buries are designed to ANSI/AWWA C153 and the XBM to C110; all three are rated 350 psi, conform to AWWA C503-18 and are NSF 61 certified. The flanged and long radius buries are not on a spec sheet.

Highlights

Mechanical joint, push-on and flanged
Los Angeles, San Diego and 8-hole drilling

Documents

SpecificationsMechanical joint, 6 x 36 in.

Mechanical joint, 6 x 36 in.

Item number	DBM636-6
Bury	Mechanical joint, Los Angeles 6-hole
Size	6 x 36 in.
Made	Ask your regional team
Lining and coating	Cement lined, asphaltic coat
Pressure rating	350 psi
Max. deflection
Weight	Ask your regional team
Pallet quantity
Spec sheet	DBM
Price list	Hydrant Bury and Extensions (Cement Lined), effective 3/24/25

Materials and build

Material	Ductile iron. DBM and DBP: ASTM A536, grade 70-50-05, 65-45-12 or 60-42-10; XBM: 70-50-05 or 60-42-10, per the spec sheets
Design	DBM and DBP: ANSI/AWWA C153/A21.53. XBM: ANSI/AWWA C110/A21.10, per the spec sheets. Flanged and long radius buries: ask your regional team
Lining	Cement-mortar lining per ANSI/AWWA C104/A21.4, per the spec sheets
Seal coat	Asphaltic seal coat per ANSI/AWWA C104/A21.4, or fusion bonded epoxy per ANSI/AWWA C116/A21.16
Drilling	Los Angeles 6-hole: 3/4 in. holes on a 9.38 in. bolt circle. 8-hole: 7/8 in. holes on a 9.5 in. bolt circle. San Diego 6-hole: 7/8 in. holes on a 9.5 in. bolt circle. Other drilling: ask your regional team

Rating and use

Pressure	350 psi on the DBM, DBP and XBM spec sheets
Standards	DBM, DBP and XBM: conform to AWWA C503-18 and NSF 61 certified, per the spec sheets. Flanged and long radius buries: ask your regional team
Not on a spec sheet	Flanged and long radius buries are on the price list but not on a spec sheet. Ask your regional team for a drawing

Dimensions

Size	Printed as 6 x height. The height runs from the centerline of the inlet to the top flange face (L on the spec sheets). Match it to the plans
Other dimensions	Ask your regional team

From the hydrant price lists (cement lined and fusion epoxy, effective 3/24/25) and the DBM, DBP and XBM spec sheets (October 2026).

Every size and item number7 sizes · item numbers

The sizes that come with the connection, drilling and coat picked above. Pick a size to load it.

Hydrant buries: item numbers by size
Size	Item #	Pressure	Weight
	DBLM616-6
	DBM624-6	350 psi
	DBM630-6	350 psi
	DBM636-6	350 psi
	DBM642-6	350 psi
	DBM648-6	350 psi
	DBM654-6	350 psi

Item numbers from the hydrant price lists, effective 3/24/25. San Diego drilled buries are priced by request and listed with the asphaltic coat only; for fusion bonded epoxy or a C210 exterior with San Diego drilling, ask your regional team. The XBM spec sheet lists weights; the other spec sheets do not.

Questions and answers6 questions buyers ask about hydrant buries

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 does a hydrant bury do?

It is the 90 degree bend, also called a hydrant shoe, that turns the line from the main up toward a wet-barrel fire hydrant. A hydrant extension bolts to its top flange to bring the riser up to grade, and the hydrant sits on top.

Mechanical joint, push-on or flanged?

Match the end of the line from the main. The DBM is mechanical joint, the DBP push-on and the DBF flanged. The XBM is a mechanical joint bury designed to ANSI/AWWA C110 rather than C153; its item numbers end in -HI, and SIGMA sells it for Hawaii.

Which drilling do I need?

The one on your plans or the local standard. The price list has Los Angeles 6-hole, 8-hole and San Diego 6-hole drilling on most sizes. The spec sheets also show a standard 6-hole pattern (3/4 in. holes on a 9.5 in. bolt circle). For other drilling, ask your regional team.

Asphaltic coat or fusion bonded epoxy?

Both are on the price lists. Per the spec sheets, the buries are cement-mortar lined (ANSI/AWWA C104), with an asphaltic seal coat (C104) or fusion bonded epoxy (ANSI/AWWA C116). Check the spec for the job, and ask your regional team if you need an epoxy lining. San Diego drilled buries are listed with the asphaltic coat only: for fusion bonded epoxy or a C210 exterior with San Diego drilling, ask your regional team.

Is there a drawing for the long radius 6 x 16 in. bury?

The DBM spec sheet lists a 6 x 16 in. bury (DBM616), but the price list sells the 6 x 16 in. mechanical joint and push-on buries as long radius (DBLM616 and DBLP616), and those are not on the spec sheets. Ask your regional team for a drawing.