Mains - Hydrants - Fire Services - Temporary Blow-Off Detail

Nov 4, 2026

Uploaded by 673605

Engineering drawing sheet for San Jose Water Company detailing temporary blow-off components for fire protection service. Includes tapping schedule tables by pipe material with connection types and 3/4-inch nominal diameter guidance, and installation requirements for air valves and check valves in pavement enclosures. Specifies notes on leaving corp/lever or corp/angle stops open, blow-off main before installing air valve, placement conditions for concrete cap and sand backfill, and reference to related installation drawings and standards for complete make and model lists.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages16

Reading Time40 min

AccessFree to download

Tapping Schedule

Pipe connections and sizes

Notes and installation requirements

Concrete cap, sand backfill, and valve positioning

Air valve & check valve makes

Manufacturer options and mounting notes

Standard air valve installation drawings

In enclosure, in pavement, and single air valve

Mains,Hydrants &FireServices DEVELOPER'S CONTRACTOR) # TEMPORARY BLOW-OFF DETAIL | | | Sd0 | | | | | --- | --- | --- | --- | --- | --- | | | | | | | | | | | 兰 | SAN JOSE WATER COMPANY | | | | | | DATE | | | | | | | | PRIVATE FIRE
PROTECTION SERVICE | | | | | | NO
ISIA
38 | | | | | | | | 6
N.TRINH | 与m08 | REF.NOS. | | | | | DATE
9/30/2018 | | | | | | | | | DWG.NO.
FS
d | | | | | 马 | | | | | | | | kdla o | | | | | 而 | SCALE
NONE | | | tive 10/09/2018 | TAPPING SCHEDULE | | | | --- | --- | --- | | PIPE | PIPE CONNECTION | SIZE | | STEEL | *SDL,SSCC,(THRU 103/4")
**WELD CPLG(ALL OTHERS) | NOM.DIA.X3/4"
3/4" | | AC | *SDL,SSCC,(4")
*DIR TAP,STOP CORP(6"&OVER) | NOM.DIA.X3/4"
3/4" | | CI &DICL | *DIRECT TAP,STOP CORP | 3/4" | | PVC | **SDL,PVC | NOM.DIA.×3/4" | NOTE: CORP AND LEVER VALVE TO BE LEFTOPEN CONCRETE CAP &SAND BACKFILL TO BEPLACED ONLYIF: A.DISTANCE FROM TOP OF PIPE TOSUBGRADE IS 18"OR LESS. B.DISTANCE FROM TOP OF PIPE TOFIN/SHED GRADE IS LESS THAN 3'.BLOW OFF MAIN BEFORE INSTALLINGAIR VALVE SEE MAIN-AVpavt FOR INSTALLATION OFAIR VALVE IN PAVEMENTFOR MAKES &MODEL NUMBERS | | | | | | | | | --- | --- | --- | --- | --- | --- | --- | | | | | | | | | | | | | SAN JOSE WATER COMPANY | | | | | | | DATE | | | | | | | | | STANDARD 1/2"AIR VALVE
INSTALLATION(IN ENCLOSURE) | | | | | | | NOISIA38 | | | | | | | | | BY
DTFOLK'G | | | REF。NOS. | | | | | DATE
3/14/2013 | OPERATIONS | | | | | | | | ENGINEERING
627 | | DWG.NO.
MAIN-AVag | | | | | CK | | | | | | | | | CHIEF ENGINEER | | | | | | | SCALE
SHOWN | | | | Effective 8/21/14 CRISPIN MIDGET FITTINGS | TAPPING SCHEDULE | | | | --- | --- | --- | | PIPE | PIPE CONNECTION | SIZE | | STEEL | *SDL,SSCC,(THRU 103/4")
**WELD CPLG(ALL OTHERS) | NOM.DIA.×3/4"
3/4" | | AC &CI | *SDL,SSCC,(4") | NOM.DIA.×3/4" | | DICL | *DIRECT TAP,CORP STOP | 3/4" | | PVC | **SDL,PVC | NOM.DIA.X3/4" | # AIR VALVE &CHECK VALVE MAKES | A.V. | C.V.(LOWER) | C.V.(UPPER¹) | | --- | --- | --- | | APCO-50 | KITZ WAFER or APOLLO
BALL | KITZ WAFER,APOLLO
BALL or TIDEFLEX
DUCKBILL | | CRISPIN
MIDGET | KITZ WAFER or APOLLO
BALL | KITZ WAFER,APOLLO
BALL or TIDEFLEX
DUCKBILL | NOTES: 1)KITZ WAFER C.V.MUST BE MOUNTEDVERTICALLY 2)BLOW OFF MAIN BEFORE INSTALLINGAIR VALVE 3)CORP AND ANGLE STOP TO BE LEFTOPEN 4)MSN =METER SWIVEL NUT 5)REFER TO MATERIAL SPECIFICATIONS | | | | | LIST FOR COMPLETE LIST OF MAKE &
MODEL NUMBERS. | | | | --- | --- | --- | --- | --- | --- | --- | | | | | | | | | | | | | | SAN JOSE WATER COMPANY | | | | | | | D
ATE | | | | | | | | | STANDARD 1/2"AIR VALVE
INSTALLATION(IN PAVEMENT) | | | | | | | REVIS1ON | | | | | | | | | BY
N.TRINH | | REF.NOS. | | | | | | DATE
5/7/2019 | DISTRIBUTION SYSTEMS/DATE | | | | | | | | ENGINEERING /DATE | DWG.No.
pavt | | | | | | | | | | | | | | | ASSISTANT CHIEF ENGINEER /DATE | | | | | | | SCALE
NONE | | | | 2"STD GALV
STREET ELL 90°
2"_STD GALV
STREET ELL 90°
2”X6”STD.GALV.
NIPPLE TOEXPOE
2”STD.BLTD CPLG.
2”STD.GALV.
2"STD GALV
STREET ELL 90°
2”STD.GALV.PIPE
STREET ELL 90°
B38 METER BOX
22”X22”X22”
2"_STD GALV
(17-1/4”X30")
VENTED METAL BOX
STREET ELL 90°
2”STD.GALV.ELL 90°
2”APCO\#145C AIR VALVE
2”STD.GALV.STREET
2”STD.GALV.PIPE
ELL 90°
MIN.
2”STD.GALV.ELL 90°
SCREEN-1/8”MESHX
16 GA.WIRE
2”STD.GATE VALVE
2”STD.GALV.PIPE
2”STD.GALV.
STREET ELL 90°

FAQs

What information does the tapping schedule provide?

It lists pipe material categories and the corresponding pipe connection methods and nominal sizes for the blow-off installation.

What installation notes affect when concrete cap and sand backfill can be placed?

Placement is restricted by measured distances from the top of the pipe to the subgrade and to the finished grade.

What prerequisite is required before installing an air valve?

Blow off the main before installing the air valve.

Nov 4, 2026

Uploaded by 673605