Depending on the model there will be a few troubleshooting steps we could try.
For the classic series you really want to make sure that your rollers are fully expanded.
If it is an Econ - there is a latch behind the pump head we need to make sure is fully secured.
For anyone interested, I have...
We do not suggest using a 'Y' as there is a chance of leaking at the connection. In regards to using the 3/8" tubing, the 1/4" is fine as the pump is a positive displacement pump and increasing the tubing size does not affect the output, unless a viscous solution. I hope this might help.
Thank you for choosing Stenner Pumps for your application.
Our pumps are suitable for muriatic acid, as we are used in pools worldwide. We hope this will help clear up any confusion. Please feel free to contact us
Our pumps really only require tube changes **at least** annually - when pumping chlorine you may also want to routinely check your injection fitting for calcification. I've attached our basic service manual to answer any maintenance questions you may have.
What is the model and serial number from your pump?
If you are having issues with the output of the pump, it may be the suction tubing is not pushed into the pump tube as far as it will go. Make sure the ferrule is not crushed. Another place to check would be the injection fitting making...
That is a very nice setup. Thank you for using Stenner Pump for your application. We are attaching the Basic Service Manual which may be of help. If at any time, you need assistance, please do not hesitate to contact us here.
The best way to tell if the roller assembly hub is cracked, is to remove the tube housing cover (front cover), start the pump and see if the shaft that goes through the roller assembly is turning and the rollers are stationary. That is an indication for a cracked roller assembly hub.