pvc or flex tubing????
- Thread starter new-guy
- Start date
apos
Member
I believe that flexible stuff, provided it's both strong enough and can take the temp, is better in terms of having less drag on the water flow. Hard PVC often requires hard bends and these tend to reduce the gph, whereas flex can curve around bends more gradually. Of course, in some cases, hard pvc is still required at the ends or where you do need hard and study bends, where flex stuff might fold/bend/pinch.
salty blues
Active Member
Originally Posted by butters
http:///forum/post/2519041
i like pvc, i think it just looks better and i like solid pipes that stay where you glue them.
i HATE vinyl tubing, its just a PITA
im pumping around 1000gph throught 1in pipe that is about 1/4 closed, so flow shouldnt even be an issue
I prefer to use pvc mostly. If I have to make a 90 degree turn, I use two 45's in series to avoid flow drag.
http:///forum/post/2519041
i like pvc, i think it just looks better and i like solid pipes that stay where you glue them.
i HATE vinyl tubing, its just a PITA
im pumping around 1000gph throught 1in pipe that is about 1/4 closed, so flow shouldnt even be an issue
I prefer to use pvc mostly. If I have to make a 90 degree turn, I use two 45's in series to avoid flow drag.
salty blues
Active Member
I use pvc for the majority of my sump plumbing. If I need to make a 90 degree turn I use two 45's in series to avoid flow drag.
veni vidi vici
Active Member
Originally Posted by new-guy
http:///forum/post/2519849
i thought i read that 2 45s where worse than a 90...
You did and it is.
http:///forum/post/2519849
i thought i read that 2 45s where worse than a 90...
You did and it is.
al mc
Active Member
Originally Posted by acrylic51
http:///forum/post/2517596
Flex PVC or SpaFlex tubing would be my choice.....Better flow with less restriction, and easier to work with in alot of cases.....Requires different glue than regular pvc though
This is the best stuff, no question. Easy to work with and will decrease your resistence to flow versus hard pvc.
http:///forum/post/2517596
Flex PVC or SpaFlex tubing would be my choice.....Better flow with less restriction, and easier to work with in alot of cases.....Requires different glue than regular pvc though
This is the best stuff, no question. Easy to work with and will decrease your resistence to flow versus hard pvc.
mckaax
Member
Originally Posted by Veni Vidi Vici
http:///forum/post/2519868
You did and it is.
I find this hard to believe. Can you explain this?
http:///forum/post/2519868
You did and it is.
I find this hard to believe. Can you explain this?
veni vidi vici
Active Member
Originally Posted by mckaax
http:///forum/post/2519907
I find this hard to believe. Can you explain this?
Google "Head Loss Calculator"
http:///forum/post/2519907
I find this hard to believe. Can you explain this?
Google "Head Loss Calculator"
salty blues
Active Member
Originally Posted by Veni Vidi Vici
http:///forum/post/2519910
Google "Head Loss Calculator"
There is only a negligible difference. In my setup, using two 45's was more of a space & configuration issue than anything else.
It is still hard to understand how this could be true. Consider driving a car at speed and making a 90 degree turn versus two 45 degree turns. Which is easier to do?
Of course though, I am no physics major.
http:///forum/post/2519910
Google "Head Loss Calculator"
There is only a negligible difference. In my setup, using two 45's was more of a space & configuration issue than anything else.
It is still hard to understand how this could be true. Consider driving a car at speed and making a 90 degree turn versus two 45 degree turns. Which is easier to do?
Of course though, I am no physics major.
mugg1977
Member
The additional flow loss from 2 45's is based primarily in turbulence. When water flows straight througha pipe, this is considered laminar flow (smooth). When that water is forced to change directions, the flow becomes turbulent (and thus decreased slightly) over a certain length. With a 90, the flow returns to laminar in, let's say, 1.5". Well, with 2 45's, you have turbulence from one 45 that is not returned to laminar prior to the 2nd 45, thus the increased flow loss.
sk8shorty01
Active Member
Originally Posted by Mugg1977
http:///forum/post/2523340
The additional flow loss from 2 45's is based primarily in turbulence. When water flows straight througha pipe, this is considered laminar flow (smooth). When that water is forced to change directions, the flow becomes turbulent (and thus decreased slightly) over a certain length. With a 90, the flow returns to laminar in, let's say, 1.5". Well, with 2 45's, you have turbulence from one 45 that is not returned to laminar prior to the 2nd 45, thus the increased flow loss.
Great explaination, that really makes sense! Thanks a lot...
http:///forum/post/2523340
The additional flow loss from 2 45's is based primarily in turbulence. When water flows straight througha pipe, this is considered laminar flow (smooth). When that water is forced to change directions, the flow becomes turbulent (and thus decreased slightly) over a certain length. With a 90, the flow returns to laminar in, let's say, 1.5". Well, with 2 45's, you have turbulence from one 45 that is not returned to laminar prior to the 2nd 45, thus the increased flow loss.
Great explaination, that really makes sense! Thanks a lot...