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Replacement Filters

Replacement water filters are essential for anyone who currently owns a water filtration system.

Our replacement water filters are sold separately and can be implemented into an existing water filter system. Waterfilters.net has a comprehensive selection of water filter replacements. Some of the most commonly used replacements include drinking water filters, point of entry filters, point of use filters and whole house replacement water filters. Replacement water filters work with your filtration system to help eliminate bacteria, molds, viruses, algae and other microorganisms in your water source.

Choose the type of replacement water filter you are looking for below. If you cannot find the type of replacement filter you are looking for, please contact our customer service department.

786 Products found

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  1. Tier1 817-0131, 178584 & R173476 Comparable Pool and Spa Filter (4-Pack) and Pool Filter Cleaning Brush

    Tier1 817-0131, 178584 & R173476 Comparable Pool and Spa Filter (4-Pack) and Pool Filter Cleaning Brush

    Price $223.99 List Price Price $319.99 Save 30%
    Free Shipping
  2. Tier1 CX1100-RE Comparable Pool and Spa Filter (4-Pack) and Pool Filter Cleaning Brush

    Tier1 CX1100-RE Comparable Pool and Spa Filter (4-Pack) and Pool Filter Cleaning Brush

    Price $204.99 List Price Price $292.99 Save 30%
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  3. Tier1 Pleatco PAP100-4 and PAP100-M4 Comparable Pool and Spa Filter (4-Pack) and Pool Filter Cleaning Brush

    Tier1 Pleatco PAP100-4 and PAP100-M4 Comparable Pool and Spa Filter (4-Pack) and Pool Filter Cleaning Brush

    Price $223.68 List Price Price $319.99 Save 30%
    Free Shipping
  4. Tier1 CX1750-RE, 25230-0175S & 817-0175P Comparable Pool and Spa Filter (4-Pack) and Pool Filter Cleaning Brush

    Tier1 CX1750-RE, 25230-0175S & 817-0175P Comparable Pool and Spa Filter (4-Pack) and Pool Filter Cleaning Brush

    Price $375.99 List Price Price $536.99 Save 29%
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  5. Tier1 CX-1200-RE Comparable Pool and Spa Filter (4-Pack) and Pool Filter Cleaning Brush

    Tier1 CX-1200-RE Comparable Pool and Spa Filter (4-Pack) and Pool Filter Cleaning Brush

    Price $304.99 List Price Price $435.99 Save 30%
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  6. Tier1 6541-383 Comparable Pool and Spa Filter (4-Pack) and Pool Filter Cleaning Brush

    Tier1 6541-383 Comparable Pool and Spa Filter (4-Pack) and Pool Filter Cleaning Brush

    Price $156.99 List Price Price $223.99 Save 29%
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  7. Tier1 31489 Comparable Pool and Spa Filter (4-Pack) and Pool Filter Cleaning Brush

    Tier1 31489 Comparable Pool and Spa Filter (4-Pack) and Pool Filter Cleaning Brush

    Price $90.16 List Price Price $128.99 Save 30%
  8. Tier1 817-0131, 178584 & R173476 Comparable Pool and Spa Filter (2-Pack) and Pool Filter Cleaning Brush

    Tier1 817-0131, 178584 & R173476 Comparable Pool and Spa Filter (2-Pack) and Pool Filter Cleaning Brush

    Price $119.99 List Price Price $170.99 Save 29%
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  9. Tier1 CX1100-RE Comparable Pool and Spa Filter (2-Pack) and Pool Filter Cleaning Brush

    Tier1 CX1100-RE Comparable Pool and Spa Filter (2-Pack) and Pool Filter Cleaning Brush

    Price $114.99 List Price Price $163.99 Save 29%
    Free Shipping
  10. Tier1 Pleatco PAP100-4 and PAP100-M4 Comparable Pool and Spa Filter (2-Pack) and Pool Filter Cleaning Brush

    Tier1 Pleatco PAP100-4 and PAP100-M4 Comparable Pool and Spa Filter (2-Pack) and Pool Filter Cleaning Brush

    Price $124.62 List Price Price $177.99 Save 29%
    Free Shipping
  11. Tier1 CX1750-RE, 25230-0175S & 817-0175P Comparable Pool and Spa Filter (2-Pack) and Pool Filter Cleaning Brush

    Tier1 CX1750-RE, 25230-0175S & 817-0175P Comparable Pool and Spa Filter (2-Pack) and Pool Filter Cleaning Brush

    Price $195.99 List Price Price $279.99 Save 30%
    Free Shipping
  12. Tier1 CX-1200-RE Comparable Pool and Spa Filter (2-Pack) and Pool Filter Cleaning Brush

    Tier1 CX-1200-RE Comparable Pool and Spa Filter (2-Pack) and Pool Filter Cleaning Brush

    Price $166.99 List Price Price $238.99 Save 30%
    Free Shipping

786 Products found

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Category
  1. Point of Entry Replacement Filters 1 item
  2. Drinking Water Replacement Filters 1 item
  3. Household Filtration 784 item
Brand
  1. Aprilaire 16 item
  2. Doulton 1 item
  3. DuPont 1 item
  4. Filtrete 116 item
  5. Tier1 652 item
Price
  1. $0.00 - $99.99 349 item
  2. $100.00 - $199.99 381 item
  3. $200.00 - $299.99 49 item
  4. $300.00 and above 7 item
Advertised Size (in)
  1. 30 x 28 x 4-1/4 2 item
  2. 10 x 2 1 item
  3. 10 x 2-1/2 1 item
  4. 5 x 13 x 1 1 item
  5. 10 x 10 x 1 2 item
  6. 10 x 10 x 2 2 item
  7. 10 x 10 x 4 3 item
  8. 10 x 14 x 1 2 item
  9. 10 x 14 x 2 2 item
  10. 10 x 14 x 4 1 item
  11. 10 x 16 x 1 3 item
  12. 10 x 16 x 2 3 item
  13. 10 x 16 x 4 1 item
  14. 10 x 18 x 1 2 item
  15. 10 x 18 x 2 3 item
  16. 10 x 18 x 4 3 item
  17. 10 x 20 x 1 6 item
  18. 10 x 20 x 2 3 item
  19. 10 x 20 x 4 3 item
  20. 10 x 24 x 1 3 item
  21. 10 x 24 x 2 3 item
  22. 10 x 24 x 4 3 item
  23. 11-3/4 x 21-2/5 x 1 1 item
  24. 12 x 12 x 1 5 item
  25. 12 x 12 x 2 2 item
  26. 12 x 12 x 4 2 item
  27. 12 x 16 x 1 2 item
  28. 12 x 16 x 2 1 item
  29. 12 x 16 x 4 3 item
  30. 12 x 18 x 1 3 item
  31. 12 x 18 x 2 3 item
  32. 12 x 18 x 4 3 item
  33. 12 x 20 x 1 4 item
  34. 12 x 20 x 2 3 item
  35. 12 x 20 x 4 3 item
  36. 12 x 24 x 1 4 item
  37. 12 x 24 x 2 3 item
  38. 12 x 24 x 4 3 item
  39. 12 x 30 x 1 2 item
  40. 12 x 30 x 2 3 item
  41. 12 x 30 x 4 3 item
  42. 12 x 36 x 1 2 item
  43. 12 x 36 x 2 3 item
  44. 12 x 36 x 4 3 item
  45. 12-1/2 x 24-1/2 x 1 2 item
  46. 12-1/2 x 24-1/2 x 2 3 item
  47. 12-1/2 x 24-1/2 x 4 3 item
  48. 12-1/8 x 15 x 1 3 item
  49. 12-1/8 x 15 x 2 3 item
  50. 12-1/8 x 15 x 4 3 item
  51. 13 x 21-1/2 x 1 1 item
  52. 13 x 21-1/2 x 2 3 item
  53. 13 x 21-1/2 x 4 3 item
  54. 13 x 8 x 1 1 item
  55. 13 x 9 x 1 1 item
  56. 14 x 14 x 1 5 item
  57. 14 x 14 x 2 3 item
  58. 14 x 14 x 4 3 item
  59. 14 x 16 x 1 2 item
  60. 14 x 16 x 2 3 item
  61. 14 x 16 x 4 2 item
  62. 14 x 18 x 1 2 item
  63. 14 x 18 x 4 3 item
  64. 14 x 20 x 1 6 item
  65. 14 x 20 x 2 3 item
  66. 14 x 20 x 4 2 item
  67. 14 x 22 x 1 2 item
  68. 14 x 22 x 2 3 item
  69. 14 x 22 x 4 2 item
  70. 14 x 24 x 1 4 item
  71. 14 x 24 x 2 3 item
  72. 14 x 24 x 4 3 item
  73. 14 x 25 x 1 7 item
  74. 14 x 25 x 2 1 item
  75. 14 x 25 x 4 2 item
  76. 14 x 30 x 1 6 item
  77. 14 x 30 x 2 3 item
  78. 14 x 30 x 4 2 item
  79. 14 x 36 x 1 3 item
  80. 14 x 36 x 2 3 item
  81. 14 x 36 x 4 3 item
  82. 15 x 9 x 1 2 item
  83. 15 x 20 x 1 4 item
  84. 15 x 20 x 2 3 item
  85. 15 x 20 x 4 3 item
  86. 15 x 25 x 2 3 item
  87. 15 x 25 x 4 1 item
  88. 15 x 30 x 1 3 item
  89. 15 x 30 x 2 3 item
  90. 15 x 30 x 4 3 item
  91. 15 x 36 x 1 3 item
  92. 15 x 36 x 2 3 item
  93. 15 x 36 x 4 3 item
  94. 16 x 16 x 1 5 item
  95. 16 x 16 x 2 3 item
  96. 16 x 16 x 4 3 item
  97. 16 x 18 x 1 2 item
  98. 16 x 18 x 2 3 item
  99. 16 x 18 x 4 3 item
  100. 16 x 20 x 1 7 item
  101. 16 x 20 x 2 2 item
  102. 16 x 20 x 4 3 item
  103. 16 x 21 x 1 2 item
  104. 16 x 21 x 2 3 item
  105. 16 x 21 x 4 3 item
  106. 16 x 22 x 1 1 item
  107. 16 x 22 x 2 2 item
  108. 16 x 22 x 4 2 item
  109. 16 x 24 x 1 6 item
  110. 16 x 24 x 2 2 item
  111. 16 x 24 x 4 2 item
  112. 16 x 25 x 1 6 item
  113. 16 x 25 x 2 2 item
  114. 16 x 25 x 4 4 item
  115. 16 x 25 x 5 2 item
  116. 16 x 27 x 6 5 item
  117. 16 x 30 x 1 4 item
  118. 16 x 30 x 4 2 item
  119. 16 x 32 x 1 3 item
  120. 16 x 32 x 2 3 item
  121. 16 x 32 x 4 3 item
  122. 16 x 36 x 1 1 item
  123. 16 x 36 x 2 3 item
  124. 16 x 36 x 4 3 item
  125. 16-1/2 x 21-1/2 x 1 1 item
  126. 16-1/2 x 21-1/2 x 2 3 item
  127. 16-1/2 x 21-1/2 x 4 3 item
  128. 16-1/2 x 21-5/8 x 1 1 item
  129. 16-1/2 x 21-5/8 x 2 3 item
  130. 16-1/2 x 21-5/8 x 4 3 item
  131. 16-1/4 x 21-1/2 x 1 1 item
  132. 16-1/4 x 21-1/2 x 2 3 item
  133. 16-1/4 x 21-1/2 x 4 3 item
  134. 16-3/8 x 21-1/2 x 1 2 item
  135. 16-3/8 x 21-1/2 x 2 3 item
  136. 16-3/8 x 21-1/2 x 4 3 item
  137. 17 x 22 x 1 3 item
  138. 17 x 22 x 2 3 item
  139. 17 x 22 x 4 2 item
  140. 17 x 27-1/4 x 6-1/4 1 item
  141. 17-1/2 x 23-1/2 x 1 3 item
  142. 18 x 18 x 1 5 item
  143. 18 x 18 x 2 3 item
  144. 18 x 18 x 4 3 item
  145. 18 x 20 x 1 1 item
  146. 18 x 20 x 2 2 item
  147. 18 x 20 x 4 3 item
  148. 18 x 22 x 1 3 item
  149. 18 x 22 x 2 3 item
  150. 18 x 22 x 4 3 item
  151. 18 x 24 x 1 5 item
  152. 18 x 24 x 2 3 item
  153. 18 x 24 x 4 3 item
  154. 18 x 25 x 1 1 item
  155. 18 x 25 x 2 3 item
  156. 18 x 25 x 4 3 item
  157. 18 x 28 x 4-1/4 2 item
  158. 18 x 30 x 1 3 item
  159. 18 x 30 x 2 3 item
  160. 18 x 30 x 4 3 item
  161. 18 x 36 x 1 2 item
  162. 18 x 36 x 2 3 item
  163. 18 x 36 x 4 3 item
  164. 20 x 20 x 1 7 item
  165. 20 x 20 x 2 3 item
  166. 20 x 20 x 4 4 item
  167. 20 x 20 x 5 1 item
  168. 20 x 21 x 1 2 item
  169. 20 x 21 x 2 3 item
  170. 20 x 21 x 4 2 item
  171. 20 x 21-1/2 x 1 3 item
  172. 20 x 21-1/2 x 2 6 item
  173. 20 x 21-1/2 x 4 6 item
  174. 20 x 22 x 1 1 item
  175. 20 x 22 x 2 3 item
  176. 20 x 22 x 4 3 item
  177. 20 x 22-1/4 x 1 2 item
  178. 20 x 22-1/4 x 2 3 item
  179. 20 x 22-1/4 x 4 2 item
  180. 20 x 23 x 1 2 item
  181. 20 x 23 x 2 3 item
  182. 20 x 23 x 4 2 item
  183. 20 x 24 x 1 4 item
  184. 20 x 24 x 2 3 item
  185. 20 x 24 x 4 3 item
  186. 20 x 24-1/4 x 6 1 item
  187. 20 x 25 x 1 8 item
  188. 20 x 25 x 2 3 item
  189. 20 x 25 x 4 4 item
  190. 20 x 30 x 1 7 item
  191. 20 x 30 x 2 2 item
  192. 20 x 30 x 4 3 item
  193. 20 x 32 x 1 3 item
  194. 20 x 32 x 2 3 item
  195. 20 x 32 x 4 3 item
  196. 20 x 34 x 1 3 item
  197. 20 x 34 x 2 3 item
  198. 20 x 34 x 4 3 item
  199. 20 x 36 x 1 1 item
  200. 20 x 36 x 2 2 item
  201. 20 x 36 x 4 3 item
  202. 21 x 21 x 1 2 item
  203. 21 x 21 x 2 2 item
  204. 21 x 21 x 4 2 item
  205. 21 x 23 x 1 2 item
  206. 21 x 23 x 2 3 item
  207. 21 x 23 x 4 3 item
  208. 21 x 26 x 4-1/4 5 item
  209. 21-1/2 x 21-1/2 x 1 3 item
  210. 21-1/2 x 21-1/2 x 2 3 item
  211. 21-1/2 x 21-1/2 x 4 3 item
  212. 21-1/2 x 23-1/2 x 1 2 item
  213. 21-1/2 x 23-1/2 x 2 3 item
  214. 21-1/2 x 23-1/2 x 4 3 item
  215. 21-1/2 x 23-3/8 x 1 2 item
  216. 21-1/2 x 23-3/8 x 2 3 item
  217. 21-1/2 x 23-3/8 x 4 3 item
  218. 21-1/4 x 21-1/4 x 1 3 item
  219. 21-1/4 x 21-1/4 x 2 3 item
  220. 21-1/4 x 21-1/4 x 4 3 item
  221. 21-1/4 x 23-1/4 x 1 3 item
  222. 21-1/4 x 23-1/4 x 2 3 item
  223. 21-1/4 x 23-1/4 x 4 3 item
  224. 22 x 22 x 1 4 item
  225. 22 x 22 x 2 3 item
  226. 22 x 22 x 4 2 item
  227. 22 x 24 x 1 3 item
  228. 22 x 24 x 2 3 item
  229. 22 x 24 x 4 3 item
  230. 22 x 26 x 1 3 item
  231. 22 x 26 x 2 3 item
  232. 22 x 26 x 4 3 item
  233. 22 x 28 x 1 2 item
  234. 22 x 28 x 2 3 item
  235. 22 x 28 x 4 3 item
  236. 22 x 36 x 1 3 item
  237. 22 x 36 x 2 3 item
  238. 22 x 36 x 4 3 item
  239. 23-1/2 x 23-1/2 x 1 2 item
  240. 24 x 24 x 1 4 item
  241. 24 x 24 x 2 3 item
  242. 24 x 24 x 4 3 item
  243. 24 x 25 x 1 3 item
  244. 24 x 25 x 2 3 item
  245. 24 x 25 x 4 3 item
  246. 24 x 28 x 1 2 item
  247. 24 x 28 x 2 3 item
  248. 24 x 28 x 4 3 item
  249. 24 x 30 x 1 3 item
  250. 24 x 30 x 2 3 item
  251. 24 x 30 x 4 3 item
  252. 24 x 36 x 1 2 item
  253. 24 x 36 x 2 3 item
  254. 24 x 36 x 4 3 item
  255. 25 x 25 x 1 3 item
  256. 25 x 25 x 2 3 item
  257. 25 x 25 x 4 1 item
  258. 30 x 30 x 1 2 item
  259. 30 x 30 x 2 3 item
  260. 30 x 30 x 4 2 item
  261. 30 x 36 x 1 3 item
  262. 30 x 36 x 2 3 item
  263. 30 x 36 x 4 3 item
Micron Rating (Nominal)
  1. 0⋅1 2 item
  2. 10 1 item
  3. 20 1 item
Filter Diameter (inches)
  1. 5 - 6 10 item
  2. 6 - 7 10 item
  3. 7 - 8 2 item
  4. 8 - 9 11 item
  5. 9 and up 7 item
Filter Length (inches)
  1. 6 - 9 4 item
  2. 9 - 12 5 item
  3. 12 - 15 4 item
  4. 15 - 18 5 item
  5. 18 - 21 4 item
  6. 21 - 24 10 item
  7. 24 - 27 4 item
  8. 27 - 30 3 item
  9. 30 and up 1 item
Pool/Spa Manufacturer
  1. Tier1 40 item
MERV Rating
  1. MERV:7 21 item
  2. MERV:8 212 item
  3. MERV:10 3 item
  4. MERV:11 283 item
  5. MERV:12 25 item
  6. MERV:13 191 item
  7. MERV:15 7 item
Filter Life (months)
  1. 3 months 766 item
  2. 6 months 4 item
  3. 12 months 22 item
  4. 18 months 716 item
Filter Life (gallons)
  1. 10,000 - 25,000 1 item