New Basement Sump Setup: Loud Vibration Through Plumbing?
 

Ive been working on a new setup And i think Im to the final step. I have an terrible vibration and noise from the pump through the PVC plumbing into the floor. I realize it is hard to trouble shoot so ill try to start by adding photos.

It appears the vibration is traveling from the pump throught the pump in the following areas

- on the intake side (1” pvc) to the acrylic sump. I can feel vibration in sump.
- through the output side (1 1/4” pvc) to the floor and the back of the stand where the plumbing is mounted.

Ive tried to loosen the metal clamps holding the pipe to the floor joists but it only reduced noise slightly.

Ive thought about cutting the pip on the intake and output sides and adding 6”-12” of soft tube to try to break the vibration.

Is it possible the plumbing size is to small? Any ideas?

More photos of the setup

I added 5' of vinyl tubing before the pvc and it makes pipe noise silent.

On yours I would add 2' to your first T. The only problem with adding tubing is the barbed hose adaptors restrict flow, with that pump you may be alright. With a DC pump you would want to go up a size for the tubing so flow is not restricted.

on a side note... whats with the brass valve above the tank?
brass contains copper which over time will leach out from the brass fitting and copper is toxic to marine organisms..
It is only ok to have copper being used before a RO/DI filtration system.. Nothing after that should be copper/brass..

Ok cool. I will probably up size the section where the vinyl will be.


Any suggestion on type of tubing to use?

It is part of my light mount. I built it out of gas pipe and added that section with the valve for decoration.

looks cool

The other thing to consider is that you may be constricting the suction side of that pump. Hard to tell from the photo, but it looks like smaller diameter piping than the pressure side ..... plus it is too long. That may be causing the pump to vibrate/cavitate unnecessarily.

Silicone is the best. If you go vinyl get the thin walled cheap stuff. The thicker stuff will retain vibrations

Good.. I thought it might be for decoration.. just wanted to confirm..

You are correct, I used 1” on the suction side and 1.25” on the feed side. I dont know how to shorten it without eliminating the valve and union?

Get rid of the valve on the intake side. For best performance, you want the intake to be as wide as feasible- probably 1.5 inches for that pump. If you need to dial it back, do so after the pump on the output side.


Sent from my iPhone using Tapatalk

Ok. So right now the connection on the pump is 1” and the bulkhead in the sump is 1”. So i should increase that to 1.5 “ and use 1.5 inner diameter soft tubing?

New Basement Sump Setup: Loud Vibration Through Plumbing?
 

What’s the diameter of the intake on the pump? Not the pvc, the actual thread on the volute housing you attach the pvc to? 1 inch?

If so- ditch the valve, and the union. You don’t need a union if you have silicone tube attached with pipe clamps.

Find a 1” slip to 1.5 inch fipt adapter, preferably one with a threaded female end. I assume your bulkhead is slip. If threaded, use the appropriate mipt x fipt adapter
https://uploads.tapatalk-cdn.com/201...01e16f1d83.jpg

Screw on a 1.5” mipt hose barb

https://uploads.tapatalk-cdn.com/201...de84f0365b.jpg

and attach 5-6 inches of 1.5 inch silicone tubing

https://uploads.tapatalk-cdn.com/201...02500d83c5.jpg


to 1.5 inch fipt threaded barb,

https://uploads.tapatalk-cdn.com/201...fbe7ba1cb0.jpg

To a 1.5 inch MIPT to 1inch fitp bushing

https://uploads.tapatalk-cdn.com/201...0181d25709.jpg

Onto the pump.

This keeps everything above 1 inch, which is the size of the bulkhead and the intake. You won’t have to worry that you are restricting flow more than necessary.

Pump model number?


Sent from my iPhone using Tapatalk

The pump is a Gen-X PCX70hp with the same specs as the iwaki 70rlt.

The inlet and outlet on the volute are 1” threaded

Max Flow: 1537.5gph; 15 PSI
Power Consumption: 300W @110V, 3.2 amps
Max Head: 31.8ft
Speed: 3200RPM
Fittings (Inlet/Outlet): 1" MPT / 1" MPT
Comparable to Iwaki 70RLT

Thanks for the info. Our posts crossed in the tubes.

The parts I’ve described should work, it seems convoluted by it should keep everything between the bulkhead and the intake above 1 inch, plus removes the unnecessary union and valve.


Sent from my iPhone using Tapatalk

i also recommend a section of soft tubing to help with vibrations. Also, while you are working, you may want to throw something in between the pump and the wood it is mounted on. Never know, it may be contributing a bit to the vibrations. I use a cheap silicone square pot holder and it seems to do the trick.

New setup. I found 1.5” inner diameter tubing .

That will probably leak out the threads. I hope it does not.

don't use barbed fittings that really cuts/restricts flow

Your pump is so strong the barbed fittings may fly.

Im not sure of any other way to attach soft tubing?

You could also just put the tubing over bare pipe and use zipties. Use a heatgun to get the tubing hot and it will expand over and cool tight

Or possibly use the bean oil type thread sealer on those threads and hope it doesn't leak.

I have a bench grinder, and I would take/grind those threads off so you get a good seal.

many ways to skin this cat, but your on the right track ;)

Im by no means an expert but I would think barbed fittings would be much better than putting vinyl tubing directly on pvc pipe or woth modified barbs.