Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Water Connection 1mm tap with 26.5mm thread, Product Name Plant Watering Garden Hose Tool Set, Irrigation Medium Clear fresh water, Hose Length Approx.40M, Quantity 1 Set × Hose Tool, Water Pressures 0-400KPA, Material Plastic
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I have no active coupons for you right now.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG8eb918, BGc54826, BGe9bb72, BGGines, BG01f03c, BG8ccfb6, BG8FORMULAMX
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for 40m Manual Automatic DIY Micro Drip Irrigation System is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).