See if any of this post is any good to you .. I got a bit carried away
Top filling IBC with a good seating & sealing lid or a fully sealing & seating screw lidded juice tank ?
Put a standard high pressure bicycle valve stem & valve in the lid use inner tube to make th rubber sealing washers as well as using a big metal or thick plastic washer inside & out to seal the rubber washers to the valve stem . Then pump up the tank with a few PSi of compressed air from a decent sized 12v DC or 240 volt AC compressor etc.
Put in a simple hose connection outlet with a tap fitting at the bottom of the tank .
Perhaps use string pushed in from the outside of the hole tie off the string at the outside of the tank end , so you don't pull it all through into the tank
. Once you have plenty of string inside the tank, pull it up with a long bit of hooked wire , slide the outlet fitting over it. Remembering to fit the first sealing washer to the outlet union at this point. Now let it slide down the string so you can pull the fittings neck out through the plastic side wall . slip on the other sealing washer then the nut . Once you've tightened the securing nut fit a 1/2" adaptor to the thread of the union .
Then you can run some Antelco micro spray heads off the half inch main line … down to 6 mm branch lines out to a max of 12 micro spray heads off each half inch line .
These spray heads can spray up to 3 litres of water over a circle of 3 mtr dia per minute . or 2 litres per min if you use 180 degree arc spray heads.
If you use a Hoselock AC1 battery operated water time clock you can set the water to run at night when things won't evaporate so quickly .
It was my mate who lived in the middle of nowhere who set up the pressurized two mtr tall by about 1200 mm dia ex fruit juice , now rain water barrels . He had three 30 foot x 18 foot polytunnels being irrigated by them and a dozen or more Antelco variable misting sprays over some of his veg plot .
I've tried all manner of drippers & spray heads in the last 13 years . I reckon I must have spent five or six hundered pounds on useless stuff before I started to use Antelco products.
Nothing I know of can beat the Antelco gear , nothing at all .
It weathers well too , wrt. ultra violet & infra red light , most of my spray heads & tubing is / are over six years old .
Hose lock tubing is not very good , for some reason the wall thickness is about half of what it needs to be.
My water is now supplied from the mains ...it complies with byelaw 94 .. the copper pipe work straight after the stop cock is fitted with an approved brass anti syphon device that also has a self closing piston that shuts off the water if the water in the pipe is suddenly allowed to flow unrestricted at full mains pressure . ( £ 7.80 ish )
Check out eBay item number 262990524514:
Antelco vari jet adjustable volume 180 degrees coverage
Get your neoprene pipe work& connectors etc . from them as well if at all possible .
Over the years , especially in my glass house , I've found that I needed to use some 8 mm copper gas pipe to make small 18 mm long sleeves to fit over the 6 mm neoprene tubing at the take off spigots & where the head assembley goes into the tube . So when it gets hot , any great pressure in the softened neoprene rubber line does not force the joints apart .
It took ages & ages to cut & debur the 150 or so copper tubing sleeves and everso slightly turn one end in to a very slight flare using a dot punch & a block of hard wood with a small hole drilled in it to take the tip of the punch as it went into the sleeve .
Currently I have six hanging basket and six plant tubs irrigating off one 1/2" branch line & eight vertical spray heads off another branch line off the same water clock using a brass Y splitter that has individual on off taps out to each branch line .
A veg garden run of twelve 180 degree adjustable ( blue top ) spray heads for the veg beds .
In the glasshouse there are twenty six variable spray or misting heads running off a water clock again using a Y splitter set up , . these are on eight foot long 6 mm end lines so some can reach into the middle of the glasshouse to irrigate plants in pots & tubs set out on up to five stainless steel wheeled kitchen trolleys. (These beat fixed glass house staging every time.)
Finally another 15 vari jet 180 spray heads or vertical misting spray jets , off a time clock & Tee to keep our 60 or so bonsai watered several times aday through the hotter weather .
If the weather forecast is for rain I simply walk out & turn off all the outside water timing clocks , turning them on again when strong sun or prolonged dry windy weather is forecast .
instead of using the expensive to buy approved push in the ground plastic mounting stalks to fit the raised spray heads to , I've used three small tents worth ( 30 plus? ) of 400 mm long x 8 or 6 mm carbon fibre tent poles & taped the spray head on close to the top of each of the pole .
Some of the tent poles have ben used one in the other to make even taller poles .