Just to clarify my previous posting on pipe size, I when out and checked the 7 scraped mounts I have and out of the seven here what I found....I was wrong on the 4 1/2, should have been 4", but the larger size may only apply to people with the Raydex dishes.
1 Winegard 10' dish mounts use 4" OD pipe
1 Zenith 8' dish mount use 4" OD pipe ( same mount as the Winegard )
1 use a 3" OD pipe
4 used 3 1/2 OD pipe
Now both my Raydex dish are using a 4 1/2 inch OD pipe because of the way they mount to the pipe, I could probably go up to a 6" pipe with them, only being limited to the bolts length.
In your case get the dish before getting buying any pipe due to the different mounts and there requirements
PLEASE LOG IN TO GET RID OF THESE ADS!