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Does anybody know where would i get this kind of water pump ?
This pump is a crap.I'll have to look for some other pump.
I have used a few types of water pumps from vehicle's windscreen washer jets in the past, but I'd say the best ones are the newer type from German cars. BMW, or VW use a higher pressure pump.
There's always plenty available for use in motor homes and caravans too. These are like a sealed submergible pump you just drop in a tank connect the terminals, tubing and off you go, they might be a little larger than the one you have there, but they're not huge things and very cheap too. we used to use them to replace car windscreen pumps, due to how cheap they were.
I know this is a late reply and you've probably already found something, but thought it might help someone else in the future.
Smoke 'em if you got 'em!
I ended up buying a car windscreen pump.
Your early reply would have saved me some time.
Been really busy and not had much time to go online. I assume it works ok?
Keep the caravan pump in mind for future projects though, they are so simple to use.
Its working fine.
sorry to hear you have a problem with the pump. That one is very like the ones used on our motorcycle in appearance.They too will not "suck"in water but must be primed and fitted below the fluid container (in our case below the fuel tank ) so they are constantly fed by gravity , so they pump out fluid at anything to about 7 CFM top the carbs
here is one like the ones we have used when Yamaha pumps fail and replacements of OEM is too expensive. they do work and can be placed above the tank bottom by 12"
If you need me to pick one up here in the UK for you let me know by PM.
I placed the pump below bottles as you suggested and it works to some extent.Pump throws out a little water but only when the bottle is pressed( water is forced out).
If the pump is being primed by gravity feed from the bottles you did remember to fit the water bottles with a snorkel to let air in & no water out, right?
If you forgot what you are asking the pump to do is suck the bottle sides inwards and that would be some pump !
A self primed pump should work if not it is useless and should be returned as not fit for purpose.
Lets hope your new pump is upto snuff
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I see you have been busy on Flea-bay, the racers I know use those one way valves on the air inlet to the gas tank so that in the event of the bike getting thrown down the track no fuel gets on the track.
Back home we also fitted them to our Dirt bike engine cases for river crossings, when the engine is hot the sudden chilling of the clutch & magneto covers would cause the pressure under them to drop and water got sucked in passed the gaskets so you ended up with oil & water being beaten together in the clutch & gear box. NOT good for a healthy engine.
The stupid thing was Yamaha had put special cast mounting areas for air hose spigots for just such breather hose and non-return valves but never actually used them in the final build. Odd to say the least.
Any way if Kawal uses them, they will, as you say, allow the pump to work as there will be no restriction to allow air to replace the pumped water in the bottles with no fear of water leaking onto the electrics of the Robot. The other bonus of course that the valves would allow him to lay the bottles down keeping the weight low and thus more stable & as you said just have an air intake snorkel up to the highest point of the 'bot.
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