5.09

(129.7)

4.28

(108.7)

4.00

(101.6)

Clearance for 

0.25" screw

(2) mounting 

holes

2.50

(63.5)

5.09

(129.7)

1.53

(129.7)

1.59

(40.5)

2.53

(64.3)

0.75 -14 FNPT thru near wall only

0.875" knockout on opposite side

and centered in rear of enclosure

0.25" 

FNPT

2.53

(64.3)

LOW

HIGH

5.09

(129.7)

7.00

(177.8)

4.00

(101.6)

5.50

(139.4)

1.53

(38.8)

Clearance for

0.25" screw

(2) mounting holes

1.59

(40.5)

2.50

(63.5)

0.25" 

FNPT

0.75 -14 FNPT thru near wall only

0.875" DIA. knockout on opposite side

and centered in rear of enclosure

Bulletin 8757

page 7

8757-H400

8757-H400K

8757-DG

Dimension inches (mm) | Pressure Switches