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UK General Cleaning Forum => General Cleaning Forum => Topic started by: Anttoeknee on July 13, 2020, 09:56:10 am

Title: Dual feed ?
Post by: Anttoeknee on July 13, 2020, 09:56:10 am

Morning all

Will be purchasing a PW with a 21LPM flow rate . I’ve just seen a video claiming to get the 21 LPM flow rate you need a dual feed into the machine.  Surely a single feed from a water butt / tank with a good suction hose suffice?   From looking most only have a single feed.

Title: Re: Dual feed ?
Post by: Smudger on July 13, 2020, 01:06:05 pm

That sounds like q washers to me

Twin feed is ok - however it suffers from water turbulence - on the rear feed it enters the pump from a right angle bend in the pipe - for the most part this is fine but on many occasions I ended up with a stutter in the machine - a local p/w company to me pointed out that the plumbing was not the best and should be a single feed but with a straight 1" diameter hose feed

Since that change I don't get stutter or air into the p/w and feel that the pump pushes out a better pressure on a consistent basis

Darran

Title: Re: Dual feed ?
Post by: Anttoeknee on July 13, 2020, 04:29:20 pm

Thanks. 
If I purchased a wheelie bin and used this as a water tank I wouldn’t have any problems having a outlet at the bottom or would I be better just placing the suction inside ?

Title: Re: Dual feed ?
Post by: Smudger on July 13, 2020, 04:38:04 pm

When I used a wheelie bin I had the outlet at the bottom - better when starting a job as the pump doesn't need to suck air and with the outlet at the bottom the weight of the water keeps you with a good supply to the pump

be aware if the mains pressure is pants a wheelie bin will only give around 15 mins of p/w time

I'd also invest in 3/4" hose like tricoflex from the mains tap to wheelie bin as this allows faster filling

Darran

Title: Re: Dual feed ?
Post by: Mike Halliday on July 15, 2020, 07:57:23 am

I use a 30/lt machine with a single feed I have a couple of pumps at 40lt/min that are set up for single feed. It you use the correct bore supply hose with the matching bore fitting then single feed is fine. But I often see hydraulic fittings that have a much smaller internal bore size, this is because they need to be rated for a very high pressure rating, but supply hose is not under pressure, so you could use plastic or brass fitting which internally is much wider

Title: Re: Dual feed ?
Post by: Smudger on July 15, 2020, 05:11:19 pm

good point mike

Title: Re: Dual feed ?
Post by: zesty on July 27, 2020, 07:45:59 am

Single feed, jetmac did a video on this. Have a look on YouTube!

Good point about the internal diameter of the couplings. Same applies to window cleaning hoses.