There are 2 ways of measuring for a proper bowl size fit. One way is using a string or a OD tape to measure the hose. Another way and most accurate is using a digital caliper to measure the inside of the bowl on the coupling.
Materials needed to get started:
- Hose and / or coupling
- Digital Calliper
- Rope / string
- Marker
- OD tape
- Measuring tape
Calculating a hose diameter using a string
- Place a lay flat hose on a flat smooth surface
- Wrap the string around the hose
- Keep the string running around the diameter straight and true
- Mark the string across both ends
- Lay out the sting next to a yard stick and tape measure
- Read the length of the string from mark to mark
- This will give you the circumference of the hose
- Take this length and divide by PIE: 3.1416
- This will give you the diameter of the hose
Calculating a hose diameter using a OD tape
- Wrap the OD tape around the hose
- Read the length of the string from mark to mark
- This will give you the diameter of the hose
Calculating the inside diameter with a digital calliper
- Place the inside tips of the calliper on the inside of the bowl (coupling)
- Expand the tips of the calliper until they're fully extended to the bowl size
- This will give you the correct size of the bowl needed
- 1.75 is equivalent to a 1 3/4 size bowl
