Do you rinse split peas after soaking?
Rinse the split peas after soaking until the water runs clear.
Rinse dry peas under cool water before adding to recipes. This helps remove dust and dirt.
There's no need to soak the yellow split peas before you cook them. Like lentils, split peas cook relatively quickly even without soaking. Feel free to soak overnight if you want to reduce the cooking time. This could potentially make the yellow split peas easier to digest, too.
To Soak or Not to Soak
It's true, soaking peas overnight in water shortens their cooking time. But soaking isn't entirely necessary. Split peas cook relatively quickly. Unsoaked peas take from 1 to 2 hours of simmering; soaked peas take about 40 minutes.
- Rinse your cooked legumes. The first thing you can do is drain and rinse your legumes. ...
- Cook your legumes thoroughly. ...
- Add baking soda to your legumes. ...
- Try alpha-galactosidase supplements. ...
- Eat more legumes.
It's always a good idea to wash and "pick over" a bag of dried beans before soaking them. You never know what sort of grit or weirdness you might find. It's a lot more difficult to find the stuff-that-isn't-beans once it's all been soaking together for a long time.
Stovetop. Rinse split peas before cooking. Place 1 cup of split peas in a large pot with 2 cups of water and ½ tsp salt. Bring to a boil, then reduce to a simmer, cover and cook until smooth, 25 minutes.
Simply place dried beans in a container, cover them with water and let them soak. They'll need to soak eight to 12 hours, but the key to eliminating the gas is draining and rinsing every three hours. Yup, you read that right. Drain, rinse and start soaking again every three hours.
After grinding and milling, a flour retaining soluble fibres, starches and proteins, vitamins and minerals is obtained. Being water-soluble, pea proteins are therefore easily separated from fibre and starch by wet filtration and centrifugation.
By soaking peas for several hours and then slow-cooking them, the vegetable proteins will be rendered more digestible and pesky phytic acids will be neutralized, allowing the previous vitamins and minerals to be better absorbed.
Do you wash yellow split peas?
Some people prefer to soak split peas, either for a few hours or overnight, and this can reduce the cooking time. Rinsing is a good idea if you're not soaking them. Pick through the split peas first and remove any debris that found its way into the package, then rinse quickly in a colander to wash away dirt.
To reduce cooking time, soak 1 cup split peas overnight in 3 cups of water and 1 tsp salt.

References
- https://beaninstitute.com/two-ways-to-soak-beans-to-reduce-gas/
- https://cooking.stackexchange.com/questions/6768/should-dry-beans-be-washed-before-soaking
- https://gratefulgrazer.com/yellow-split-pea-soup/
- https://www.colourmypalate.com/blog/2022/7/31/reducing-gas-in-legumes
- https://www.healthifyme.com/blog/split-peas/
- https://www.healthline.com/nutrition/green-peas-are-healthy
- https://nutritionfacts.org/topics/split-peas/
- https://pretenditsadonut.com/2019/10/15/4-ways-to-make-split-pea-soup/
- https://kristenyarker.com/kristen-yarker-dietitian-blog/2017/12/11/how-to-make-beans-and-lentils-less-gassy
- https://www.allrecipes.com/article/split-pea-soup/
- https://www.bobsredmill.com/recipes/how-to-make/basic-preparation-instructions-for-green-split-peas/
- https://www.healthline.com/nutrition/advanced-glycation-end-products
- https://thestayathomechef.com/split-pea-soup/
- https://extension.illinois.edu/sites/default/files/blog_handout_-_split_peas.pdf
- https://greengoscantina.com/3-ways-to-cut-down-on-the-gas-producing-effects-of-chili-beans/
- https://chefsvisionknives.com/blogs/chefs-vision-blog/can-you-soak-beans-too-long-before-cooking-heres-the-truth
- https://www.tasteofhome.com/article/degassing-beans/
- https://radiantlifecatalog.com/blog/bid/71014/A-Simple-Split-Pea-Soup
- https://gogood.co.nz/blogs/news/how-is-pea-protein-manufactured
- https://healthiersteps.com/health-benefits-of-split-peas/
- https://millychino.com/how-to-cook-split-peas/
- https://www.thespruceeats.com/indian-yellow-split-pea-dal-recipe-3378495