electric toilet query

When ours stopped dropping down I rang the distributors - "It's supposed to have a spring", why doesn't it I say "because it adds to the manufacturing costs; we'll send you a pair for free plus £4.95 postage". I doubt the spring would help much either!
 
When ours stopped dropping down I rang the distributors - "It's supposed to have a spring", why doesn't it I say "because it adds to the manufacturing costs; we'll send you a pair for free plus £4.95 postage". I doubt the spring would help much either!

What size of spring, roughly? I have friends with a 'lazy' flapper.
 
About 2 inches long, the diameter of the round brass weight on the flappy rubber seal. It cured the problem straight away.
 
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