Youngandfree
Well-known member
I just think you're drastically overthinking it. Make it 4" instead of 3 to overcome the slight restrictions.
Electrical PVC for Plumbing Drain Pipe
- Thread starter lund
- Start date
BombShelter
Well-known member
The pricing is probably list, expect 20-40% off of that.
This is industrial high quality Made in USA Piping, it might be expensive but you won't have to ever worry about it.
This is industrial high quality Made in USA Piping, it might be expensive but you won't have to ever worry about it.
Not sure. But the cross sectional area of a pipe scales with pipe diameter squared. So a 4" diameter pipe has (4/3)^ ~ 1.8 times the area of a 3" diameter pipe. So that is a lot more mass to push up the hill. I was trying to keep close to the original proven design parameters. I would require some analysis to be sure. 4" schedule 80 PVC is also much less available than 3".
Probably so. But the expansion joint is still scary high. That being said, I am all for buying USA production whenever I can reasonably (and even not so much reasonably) do so. The good news is a lot of plastic/PVC pipes remain domestic production.
rayra
Well-known member
/laughs in desert southwest. It burns and gets brittle, here. You have to at least paint it.
OP, sched80 seems like overkill for an unpressured waste line. But why aren't you using ABS sewage pipe anyway? And such pipe specifically has the wide radius sweeps that you are after.
And as for joint leaks? This is solvent-welded slip joints in PVC / ABS pipe, what am I missing. Why would such joints, properly glued, be leaking?
Youngandfree
Well-known member
Actually the mass of the water flow is the same. The pump doesn't create more volume. Creating less backpressure should make the pump work a little easier.
its the same but the gray has a uv protecter. but the deal is, its against code and you will replace it. on the big pipe green is sewer, blue is water, its the same pipe but color. i saw an inspector make them change pipe because of the color of the pipe. it was buried 20 feet down and over a mile of it. it got replaced at contractor cost
More force from more mass/volume in the larger pipe will result in the pump working harder. At least ideally, the overall energy may be roughly conserved (same) in the basin evacuation cycle independent of the pipe diameter. But with the larger pipe, the pump while on (in a briefer interval on to evacuate the basin) will need to provide more power. Generally one wants a relatively short on cycle, but not near max pump horsepower over the cycle. This is a 20A pump with a large surge current also. I am not sure on the optimum, but I am hesitant to change what has worked well.
Yes, good point I did not consider. Thanks. I have no experience doing such but I guess I could optimize the line bends by buying a heater and bending exactly what I need. I guess I could practice on a piece or two.
Schedule 80 is likely overkill if well anchored. But heavier to have more mass so it does not move around and stress as the fluid stops and starts when being pumped up the hill. This is a 35 ft rise over a 50 ft run so it is a fair amount of fluid in motion with some pressure at the bottom. Most drain pipes are very low pressure. This one will be so at the top where it runs into the sewer but not so at the bottom near the pump and the bends before a straight shot up the hill.
I see no issue with leaks. I did not understand that comment by a poster. PVC is easy to glue and that should be very secure. The main issues are likely thermal expansion and UV along with availability of parts.
You make a good point on ABS being a better option with drain fittings but I did not consider it due to the poor UV resistance of ABS and part of the pipe being above ground running up the hillside on anchored piers. I just want to replace the pipe. It would be hell to modify to trench and bury due to the structure of the hill.
I will probably avoid inspection and it will not be noticed. But this is the type of stuff that worries me on a what if basis should I attract scrutiny. A mile of pipe to redo is crazy. I hope the reason for that was more than the color code or it is a colossal waste over nothing.
mike93lx
ALLIANCE MEMBER
You can rent purpose made boxes and blankets from a place like sunbelt or united (maybe a local one too. I wouldn't mess with a DIY solution as the pro stuff works so well
larry4406
Well-known member
Rent/buy this:
4" PVC Bender | Greenlee
Find product features and specification information for the Greenlee 851 4" PVC Bender. Shop bending tools now.
www.greenlee.com
mike93lx
ALLIANCE MEMBER
At $1200, renting might be the moveRent/buy this:
4" PVC Bender | Greenlee
Find product features and specification information for the Greenlee 851 4" PVC Bender. Shop bending tools now.
Long ago I was faced with installing a water line to extend the rural water district's line to my property. The district engineer dictated the material and design. I had to install and deed to the district when completed, inspected and approved. In the process I found that glued pipe was never approved, mainly due to the thermal expansion/contraction of even buried PVC. We were required to use what the local trade calls 'o-ring pipe'. PVC with one belled end with a rubber seal factory installed. But, the supplier had none in stock and delivery was a month or more out. The engineer approved normal pipe, with the belled ends cut off and replaced with normal compression unions. This was 2" but I think the same product(s) are available in 3".
Since gray and white PVC are the same sizes those unions would solve the expansion/contraction issue.
Since gray and white PVC are the same sizes those unions would solve the expansion/contraction issue.
Steve W.
Well-known member
Rent/buy this:
4" PVC Bender | Greenlee
Find product features and specification information for the Greenlee 851 4" PVC Bender. Shop bending tools now.
Thanks. Looks great IF I can find a rental for it !
Does sound a little scary ...Doesn't your drinking water taste a little ... "funny"?
.
Even in cases where safe, natural recycling is often not so so nice to think about. But on a basic standpoint it is fortunate that water molecules are water molecules with no difference regardless of source insofar as the other nasty stuff and contaminants get removed. You cannot classical tag a water molecule. So H20 molecules peed out are identical to virgin asteroid H20 coming in from interstellar processes. I do not even want to think about the fraction of water "used" over billions of years IF it were possible to tag the molecules !