AP Diving AP50 - Shortening the Hoses on 3;8 UNF End

AP Diving Ltd. Medium Pressure and Convoluted Hose Shortening Instructions
Page 26 of 38
Of these two measurements, the bore is the more reliable. The outside diameter can vary
from batch to batch but the bore should always be consistent.
The two types of Auto Air snap connectors are easy to distinguish:
- the older type (AP150) has a straight hose connection with a diameter of 18.8 mm
- the new type (EV50) has a tapered hose connection with a diameter of 16.5 mm.
Old type snap connector (AP150 hose): New type snap connector (EV50 hose):
Straight, 18.8 mm diameter tapered, 16.5 mm diameter
The hose ends have the same difference in diameter:
Old type hose end (AP150 hose): New type hose end (EV50 hose):
18.8 mm diameter 16.5 mm diameter
5.3 Shortening the hoses on 3/8”UNF end
The process of shortening the hoses is essentially the same as described in chapter 4.
The difference is the spanner size you need: you need 2 x 19 mm spanner to handle the
older type Auto Air hose (AP150), as the hose ends are larger.
For shortening the hose on the 3/8”UNF end of the hose we refer to paragraphs 4.1 through
4.6.