RAINPOINT Water Flow Meter (Banggood, Aliexpress: Totalizer (Max.): 9 /999.9 GAL or 9 /999.9 L, Units of Measure: Gallons or Liters, Water Flow Rate: 20L/H – 2 /400L/H, Thread: for taps with 3/4” or 1” BSP or NH thread, Battery: 1 * CR2032 (Included), Working Pressure: 0.5 bar~5 bar (7.25~72.5PSI), Water Temperature: 41 to 104 ˚F (5 to 40 ˚C), Waterproof: IPX6, Brand: RAINPOINT (the best price with coupon)).
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
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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.
Link: Banggood product page
1. ($25.19): BG23ALEAprD
2. ($26.31): BG589b2e
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BGMX284, BG3c8551, BGJUNEGSG9, BG7b9c94, BGea947e, BGHUXC107, BGbfe0b4, BG1ccfe0, BG56f78b, BG21a258, BG8d94e7, Cuponation9, BG2d7e03, BGce49c8, BG0aac08, 9OFFSUMMER, BGbcb244, BG88aceb, BG1175b3, BG8ReviTrage, BG00c906, BGdbe184, BGae4373, BGf625a4, BG41da4f
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – RAINPOINT Water Flow Meter [EU] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for RAINPOINT Water Flow Meter. The lowest price was: $19.99.
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)).