Subject: When to use Netafim Dripline "Techline CV" (TLCV) vs "Techline" (TL) for SURFACE (not subsurface) applications? 1. When looking at Netafim dripline for residential applications they have two dripline product lines - TLCV and TL. TL costs 15% more than TLCV. So, to pay more for a product there must be some increased benefit; however, the only difference (pro) that I could see is that longer laterals are possible with TL vs TLCV (due to a minimum pressure of 15 psi required on TLCV vs 7 psi on TL to get start of flow through the emitter). Is this the only incremental positive difference between the two? And, is it typically worth paying more to get this feature? Any thougts on this topic? 2. Why would it cost 15% more to make/sell TL than TLCV (seems as if it would cost more to make TLCV)? Thank you. Regards, Jerry.