Hondo you can buy an antenna line feed through from Radio Shack for next to nothing and use it to keep it airtight where you drill the hole. I don't use a check valve on my system and I can always tell when I need to clean my system cause I don't clamp it to tight where it connects to the compressor so if I get to much back pressure it just blows the line off. Has worked out great and only had to clean the soaker hose twice over the summer I just use a brush and the pressure washer and then drag it back into the pond. Bob
