heres one I always use for 30 cents. I think theres one for like a few pennies less somewhere on amazon if you care.

http://www.amazon.com/NIBCO-4701-Series-Fitting-Coupling/dp/B007Q3DXSA/ref=pd_sim_sbs_hi_1?ie=UTF8&refRID=0MMEYG9MY4TNZ83K8TNH

edit: heres another for 27

http://www.amazon.com/NIBCO-4701-Series-Fitting-Coupling/dp/B007Q45AOY/ref=sr_1_18?s=hi&ie=UTF8&qid=1415739557&sr=1-18&keywords=pvc+pipe