“Under Pressure” by John Kelly of Restormate…
Welcome to another guest blog spot, this time from John Kelly of Restormate. John and Lynn’s business supplies virtually ANYTHING you need to run a cleaning or restoration business, including training courses too. Their knowledge has helped us in our carpet cleaning business more than once and they were one of the first to supply my favourite Sticky-Tabs for use under furniture feet. I love them because they stick to the foot and slide over the carpet, making it so much easier to replace items against a wall or into alcoves where sliders won’t work. I highly recommend you get some Sticky-Tabs here>>. More recently Lynn spotted a post I’d put on the TACCA Facebook page saying I urgently needed a crevice spray tool/detailing wand. Within 20 minutes Lynn put up a reply with a link to exactly what we needed and their price was very competitive too. The wand was received the next day and we had one very happy client, thanks Lynn. So, I’ll hand over to John and his informative article about jet sizes and pressure, with some great tips too…
A lot of cleaners get confused when it comes to what size jet to use on their wand and what pressure to clean at.
Personally I believe the optimum pressure to clean with is 300-400psi. The higher pressure the water the longer the water will hold heat so increased pressure means increased heat. So you have the benefit of the water hitting the carpet fibres harder and also the water being hotter as it hits the fibres, all leading to greater cleaning power.
It has been calculated that over a 100’ foot of hose run you can lose around 180psi between the pump and the wand jet. Consequently if you want 300psi at the cleaning head then your pressure regulator needs to set at 450-500.
Wand jets are graded by output and angle. Most carpet cleaning jets are 110 degrees. On a twin jet wand this ensures that the water is spread across the full length of the wand head. On 3 or 4 jet wands smaller angles are used such as 85 or even 65 degrees.
The second number on the jet is the output. Let’s say an 01 jet will put out 1 litre per minute therefore an 04 will put out 4 litres and so on.
In view of this have you ever considered using different wands for different situations. For severely soiled carpets heavy pre-sprays are often required along with adequate flushing to remove the suspended dirt. In this situation a wand jetted with 04 jets would be ideal and provide enough water flow to give a good clean. A wand with 01 jets may struggle and you may have to make more cleaning passes to achieve the same results.
However in a different scenario, say when the carpet is very worn and there is a chance of cellulosic browning or there are seams which don’t look that clever, then using a wand with a lower flow rate may be a better option.
Don’t forget the greater the flow, the lower the temperature of the water so adjust this as well if possible.
The orifice on brass spray tips will wear through time. The wear will depend on use, hardness of the water and harshness of any chemicals which go through them. This wear is hard to detect but can lead to over application of water and chemical. In view of this it is recommended to change brass jets every 3 months. Stainless steel ones will last about 3 times longer but do have a higher purchase cost.
Most wands have filters behind the jet, often a combined filter/anti drip valve. These often get clogged with chemical residue or scale. Scale is the dissolved minerals (stone) in the water which reconstitute themselves due to heat and pressure. This scale often looks like rust and people often confuse the two, especially truckmount users.
It is recommended that these filters are cleaned at least monthly if not more frequently. This will ensure the correct flow through the jets and also relieve pressure on pumps and other components. The best way to clean these filters, and also jets, is to soak them overnight in a product such as Chemspec’s DFC Calcium Lime & Rust Remover (further info available here>>).
Some great advice and I’m sure we’ll be ordering some of the Calcium Remover and probably rescuing some of the tips we’ve replaced due to poor flow rate.
Take a look at John & Lynn’s website, if they don’t have it you probably don’t need it, or they will ‘know a man who does’.
Thanks again to John.