I saw a question like this posed somewhere else on the net but none of the answers were very clear and all googling has led me nowhere on this question so here goes. What is the inside diameter of a G1/4" thread?
Here's why I'm asking: I just bought the parts for my very first loop and am waiting for them to arrive. On the advice of members of this forum I purchased 7/16ID, 5/8OD tubing and compression fittings. In thinking about the dynamics of piping, I began to wonder if the G1/4" thread side of the compression fitting was smaller than 7/16" which in my mind would impair flow and make the point of buying compression fittings and tubing of 7/16ID size less efficient than say just going with 3/8ID. From other forums and threads I know that G1/4" does not mean that the OD or ID is 1/4" (bit confusing if you ask me). So what is it? I saw one drawing where it showed the inside diameter of a G1/4" as 8mm which would be ~5/16" which would be smaller even than 3/8" in which case it seems even 3/8" would be slightly overkill. On the other hand, looking at this page it seems to me the ID is closer to 11.44mm which would be just slightly larger than 7/16". So could anyone do me a quick favor and measure the inside diameter of one of their G1/4" threads and tell me what it is?
I've seen various arguments stating that even if the diameter is smaller that it doesn't impede overall flow much but this just doesn't seem to pass the common sense test to me. Sure, maybe it doesn't slow it down to the point that it's like having smaller tubing and fittings, but surely it makes a difference? Am I just dumb?
Anyway, any help would be appreciated. Thanks for your time!
Here's why I'm asking: I just bought the parts for my very first loop and am waiting for them to arrive. On the advice of members of this forum I purchased 7/16ID, 5/8OD tubing and compression fittings. In thinking about the dynamics of piping, I began to wonder if the G1/4" thread side of the compression fitting was smaller than 7/16" which in my mind would impair flow and make the point of buying compression fittings and tubing of 7/16ID size less efficient than say just going with 3/8ID. From other forums and threads I know that G1/4" does not mean that the OD or ID is 1/4" (bit confusing if you ask me). So what is it? I saw one drawing where it showed the inside diameter of a G1/4" as 8mm which would be ~5/16" which would be smaller even than 3/8" in which case it seems even 3/8" would be slightly overkill. On the other hand, looking at this page it seems to me the ID is closer to 11.44mm which would be just slightly larger than 7/16". So could anyone do me a quick favor and measure the inside diameter of one of their G1/4" threads and tell me what it is?
I've seen various arguments stating that even if the diameter is smaller that it doesn't impede overall flow much but this just doesn't seem to pass the common sense test to me. Sure, maybe it doesn't slow it down to the point that it's like having smaller tubing and fittings, but surely it makes a difference? Am I just dumb?
Anyway, any help would be appreciated. Thanks for your time!
