FAQ: Q: How long does an instapure R2 filter last? A: The Genuine Instapure® ESSENTIALS (R2) Faucet Replacement Filter provides up to three months or 200 gallons of healthy, great-tasting water straight from your faucet*. Since It was first designed and built in the USA in 1975 the Instapure ESSENTIALS (R2) has been the leader … Read more