I would suggest a ¼ turn, one-piece, polymer-coated, compression supply line.  

With margins so compressed I'm leaning towards a direct marketing strategy as a more viable strategy for deal flow.What tips would you have for someone starting from scrath in direct marketing?

When real estate is hot and in a sellers markets, profit margins tend to get compressed.

Cap rates have been compressing and we are still making acquisitions in Stockton. 

There are some NNN  properties out there now where things are in a flux and cap rates haven't compressed quite as quickly in time with the rest of the market.    2.

The tanks have a bladder that separates the air and water (they come pre-charged) so that the air compresses when the water expands.

My timeline is beginning to compress as my tour approaches it's end.My hope is for a 4-plex less than $400K and a 10% cap rate(which I'm realizing is a high expectation) in as close as possible to move in condition without all units occupied(I'll have to live in one to satisfy the VA requirement).

I don't see a compression here.

The more reasoned and realistic thought is that margins are being compressed as the market/asset class matures.

The cap rates in my single family rental portfolio continue to compress.