[rb4no]

afternoon all,
i've got an ebay purchased "Pure Flow" controller which i have to be honest has served me really well for about two years, I;ve used it on two pumps no probs, one having been an IONICS pump and the other an EVERFLO pump to good effect. I've since changed my system to a different IONICS system, and continueing to use the same controller on the IONICS pump, thing is is that it pumps the water at a rediculous rate even at the most mininmal setting it's at least three times my normal rate. Any thoughts as to why this is the case?

[Stoots]

afternoon all,
i've got an ebay purchased "Pure Flow" controller which i have to be honest has served me really well for about two years, I;ve used it on two pumps no probs, one having been an IONICS pump and the other an EVERFLO pump to good effect. I've since changed my system to a different IONICS system, and continueing to use the same controller on the IONICS pump, thing is is that it pumps the water at a rediculous rate even at the most mininmal setting it's at least three times my normal rate. Any thoughts as to why this is the case?

pressure switch ?

those cheap home made controllers usually dont have calibration or dead end, they just vary the voltage

OR maybe your old pump deteriorated over time slowly and you didn notice, ive had old pumps and then bought a new one and been like wow thats better.

[rb4no]

yes they both have pressure switches the other pump kicks in with the ionics controller but mine doesn't guess there must be a problem

[Stoots]

yes they both have pressure switches the other pump kicks in with the ionics controller but mine doesn't guess there must be a problem

its something ive never messed with tbh, but im sure you can find out easy enough online, if you use a spring controller you never need the pressure switch.

[rb4no]

Correction it's presently powering a semi new aquatec pump which is an ionics replacement pump.

[Stoots]

Thinking again, there must be something wrong with the controller if you cant turn the flow down, afterall all they do is lower the voltage to the pump i think ?

Would probably just invest in a spring controller if i were you, will make your pump and battery last longer anyway

[Spruce]

Most cheap Chinese electronic controllers are PWM. The means that they work similarly to a Spring or Varistream except they are vastly less efficient.

A pulse wave modulation controller sends 12v current pulses to the pump. The pulse is just on and off then on and off. The slower you set the controller the longer the off portion of the pulse.  The faster the pump the longer the on pulses.

As has been stated its only the Spring and Varistream (no longer sold) that are equipped with dead ending. These cheap controllers need a working pressure switch in the pump.

This is different to dimmer switches that just reduce the voltage. The lower the voltage the dimmer the lights.

I would expect that the reason why your controller isn't working is that you have reversed it polarity and damaged the circuitry.
Its an easy mistake to make.  But then sometimes they just fail with age.
 

[rb4no]

thanks for the advise, spring controller it is then.