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NPT Sizes

3554 Views 3 Replies 4 Participants Last post by  Deez
Can anyone help me by telling me what size NPT fitting I need to run off my Edelbrock Victor waterpump and Performer intake to hook up my heater hoses. I have called a couple of the speed shops in my area and have one guy telling me 1/2 inch and another 5/8.
Your help as always is appreciated.
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You need to find out what the NPT sizes are from the water pump and get the corresponding AN size they run in 16ths..... in other words 4an is 1/4" 6an is 3/8" and 8an is 1/2" and so on .......you will use a NPT to AN fitting whatever NPT size the pump is tapped for to hook your AN fitting to.
in other words 4an is 1/4" 6an is 3/8" and 8an is 1/2" and so on
IIRC, you can take the AN number, like 4AN and divide by 16... 4/16 = 1/4, 6AN 6/16 = 3/8, 8AN 8/16 = 1/2. Same deal, just a different approach.
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