[ChuckM]

[unnecessary quoting removed]









If you're serious about pumping get a machine, there are some decent ones out there for not that much.  IMO, the hand pumps are little more than toys, trying to hold two domes in place with one hand to get a seal, and pump with the other is nothing but frustrating, and they have no pressure gauge, and the check valves are leaky and give up the ghost very quickly.  

Here is a link to the unit I bought.  It's currently unavailable from the vendor I bought it from, but the same unit is sold by different vendors, so look around on Amazon and find the one in in-stock at the best price.  I've been using this one daily for nearly 10 months at 1 - 4 hours a day, without a single issue. 

https://www.amazon.com/gp/product/B091MYR46G/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1

For check valves (if you want them), your local hardware or big box store is your friend.  Go to the plumbing section and get bag of 1/4" (or the metric equivalent if outside of the U.S.) drip line valves and connectors, your total outlay will probably be around $6 - $8.  

Best regards,    
ChuckM