Downstreaming with a Pump with Integrated Unloader and Injector Question

[RickDel 14]

Hello, I'm looking at buying a pressure washer with a General TX1510 pump w/intergrated unloader and injector. If I understand 'downstreaming' correctly, the chemicals are introducted to the water supply after it leaves the pump, so chemicals don't enter or damage the pump . However, if the TX1510 has an 'integrated' unloader/injector, does this mean the chemicals will enter the pump? I want to be able to use bleach, which I know will damage anything it touches (I plan to get a disposable bleach gun). I also realize pumps with integraged unloaders are disliked here, but I don't think I'll have any problems with the limited amount I plan to use it (UNLESS I can't use this to downstream, and in that case, I'll need to find something so I can use bleach).

General TX1510

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[TD=align: left]Brand: General/Interpump Pump[/TD]

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• General 63 Series Triplex Plunger Pump

• Built-In unloader with chemical injector

• Direct Drive with Gas Flange 8.0-13.0 HP SAE

• Max. Volume: 4.0 GPM

• Max. Discharge Pressure: 3,500 PSI

• Max. Pump Speed: 3400 RPM

• Shaft Diameter: 1” Hollow

• Max. Horsepower Requirements: 12.72 GHP

• Max. Fluid Temp.: 165° F

• Inlet: 1/2" MPT

• Outlet: 3/8" MPT

• Forged brass head has an exclusive lifetime warranty

• New long life low and high pressure seals

• Drive Side: Standard right

• Weight: 18.2 lb.

Thanks for the help. - Rick

[Douglas Hicks 128]

Upstream, before the pump

Downstream, after the pump

[RickDel 14]

Well, this is called an 'integrated injector' so is this before or after the pump? (I've read EVERY piece of literature I can find on this pump and I can't find the answer)

[mick m 19]

It will be after the pump, otherwise the it would lead to all sorts of warranty claims.

[RickDel 14]

It will be after the pump, otherwise the it would lead to all sorts of warranty claims.

Good Point!!

The owner's manual isn't pump spacific, because I think they use a couple different models, but it does say "do not use bleach" with the injector. I guess that's just to cover the hose and wand.

Thanks

[RickDel 14]

FYI...Just spoke to a Dewalt 4240 salesman who advised the General TX1510 injector is a 'siphoned' type and it does allow chemicals to enter the pump (so no bleach).

Thanks

[Russ Johnson 141]

I would recommend looking for a pump with an externally mounted unloader. If the unloader fails, and ruins the housing, you get a new unloader. On the TX, you'll have to replace the whole manifold...probably about as much as a new pump.

[RickDel 14]

I would recommend looking for a pump with an externally mounted unloader. If the unloader fails, and ruins the housing, you get a new unloader. On the TX, you'll have to replace the whole manifold...probably about as much as a new pump.

I agree! I think I'm going to get a Northstar PW with a Cat 66DX pump. That pump has an external unloader. However, I just spoke to a Northstar sales rep who told me they still discourage running bleach through the downstream, because it still has a potential of pulling some of the cleaning detergent (bleach in my case) back into the pump. (it's always something!!)

Anyhow, thanks for the reply!

[apsurfacesolutions 17]

Why don't you just call Bob at Pressure Tek and get setup with what you need.

[Timo 25]

Hi again Rick,

If you are going to downstream bleach onto something and walk away, you are going to have problems.

If you intend to rinse whatever you soak in bleach then you'll also be rinsing the bleach application apparatus.

Check out the pressure washer model that Russ recently posted up here.

It seemed like pretty substantial unit. And Russ can answer any question that you can imagine.