you can always heat the hose with a torch an then snug it to get a perfect seal.......but anything before the impellar should not leak as its under vacuum so it will help make the seal.......if you are putting too much pressure to it 80lbs then it may leak but under vacuum it may not be an issue.....there are two diff issues when you suck and when you blow .......laughing as i type this statement but it is true