This show heavily uses Hanna-Barbera and Series 6000 sound effects. This show only used 12 Series 4000 sound effects. 4 Warner Bros., 3 Premiere Edition sound effects and 2 Cartoon Trax sound effects. It only used 1 The Edge Edition sound effect.
- Earshot, Ahooga Horn A (Heard once in "In the Soup".)
- H-B BITE, CARTOON - SMALL BONE BITE (Heard once in "Drainland Unplugged".)
- H-B BOING, CARTOON - WIGGLE (Heard once in "Once More, Unto the Drains!".)
- H-B HIT, CARTOON - HORN BONK (Heard once in "Once More, Unto the Drains!".)
- H-B PICK, CARTOON - FIDDLE PICK AND RISE, LOW 02 (Heard once in a high pitch in "Land of the Giant".)
- H-B RUN, CARTOON - WILD SCRAMBLE (Heard once in "Glass Bowl of Love" and "All Dug Up".)
- H-B SPIN, CARTOON - WACKY SPIN WITH DRUM (Heard once in "Land of the Giant".)
- Hollywoodedge, Medium Stretch Pop CRT049304 (Heard once in "Drainland Unplugged".)
- Hollywoodedge, School Bell Long Ring PE193201 (Heard once in "Choo-Choo Drain".)
- Hollywoodedge, Several Rapid Swish CRT054101 (Heard once in "Meet Dr. Drain".)
- Hollywoodedge, Swish 17 Multiple Swi PE117601 (Heard once in "All Dug Up".)
- Hollywoodedge, Warning Buzzer Space PE194501 (Heard once in "Choo-Choo Drain".)
- Hollywoodedge, Wood Crashes Large Tr TE022901 (Heard once in "Land of the Giant".)
- Sound Ideas, AIRPLANE, PROP - LONG DIVE 02 (Heard once in "Drainland Unplugged".)
- Sound Ideas, BAT - SQUEALS, ANIMAL (Heard once in "Choo-Choo Drain".)
- Sound Ideas, BELL TREE - ASCENDING MEDIUM, MUSIC, PERCUSSION (Heard once in "Choo-Choo Drain".)
- Sound Ideas, BIRD, OWL - CALLING, ANIMAL 02 (Heard once in "Drainland Unplugged".)
- Sound Ideas, BITE, CARTOON - BIG CHOMP (Heard once in "Once More, Unto the Drains!" and "In the Soup".)
- Sound Ideas, BITE, CARTOON - BONE BITE (Heard quadrice in "No Butts", twice in "Drainland Unplugged" and once in "Once More, Unto the Drains!".)
- Sound Ideas, BLINK, CARTOON - XYLO EYE BLINKS (Heard once in "Drainland Unplugged", "Meet Dr. Drain", "A Ring Thing" and "No Butts".)
- Sound Ideas, BLOOP, CARTOON - LITTLE BLOOP (Heard thrice in "Drainland Unplugged", twice in "No Butts" and once in "Land of the Giant" and "Choo-Choo Drain".)
- Sound Ideas, BLURP, CARTOON - LITTLE BLURP (Heard once in "Vanity Hair".)
- Sound Ideas, BOING, CARTOON - BASS FIDDLE RISE (Heard once in "Land of the Giant".)
- Sound Ideas, BOING, CARTOON - BIG BOING (Heard once in "Drainland Unplugged".)
- Sound Ideas, BOING, CARTOON - DRUM WITH WACKY TAKE (Heard once in a low pitch in "Once More, Unto the Drains!" and in a normal pitch in "Drainland Unplugged".)
- Sound Ideas, BOING, CARTOON - EARS DRUM BOUNCE (Heard once in "Drainland Unplugged" and "All Dug Up".)
- Sound Ideas, BOING, CARTOON - FLAT JEWS HARP BOING (Heard once in "Choo-Choo Drain".)
- Sound Ideas, BOING, CARTOON - GONG BOING (Heard once in "Choo-Choo Drain", "All Dug Up" and "No Butts".)
- Sound Ideas, BOING, CARTOON - GOOD SPRONG 01 (Heard twice in "A Ring Thing", "All Dug Up" and "No Butts" and once in "Drainland Unplugged" and "Once More, Unto the Drains!".)
- Sound Ideas, BOING, CARTOON - GOOD SPRONG 02 (Heard twice in "Once More, Unto the Drains!" and once in "Drainland Unplugged", "Land of the Giant" and "No Butts".)
- Sound Ideas, BOING, CARTOON - HOYT'S BOING (Heard twice in "Once More, Unto the Drains!" and once in "In the Soup".)
- Sound Ideas, BOING, CARTOON - RIPPLE BOING (Heard once in a high pitch and briefly in a normal pitch in "Once More, Unto the Drains!".)
- Sound Ideas, BOING, CARTOON - SINGLE TIMP DOING (Heard once in "All Dug Up".)
- Sound Ideas, BOING, CARTOON - SPITTOON DOINK (Heard once in "Drainland Unplugged".)
- Sound Ideas, BOING, CARTOON - SPROING 01 (Heard once in "Land of the Giant" and "No Butts".)
- Sound Ideas, BOING, CARTOON - THIN WOOD BOING (Heard once in the intro.)
- Sound Ideas, BOING, CARTOON - TIMP RICCO BOING (Heard once in "Land of the Giant".)
- Sound Ideas, BOING, CARTOON - TIMP RISE AND BOING (1st half; heard once in "Drainland Unplugged". It is used normally in "Once More, Unto the Drains!".)
- Sound Ideas, BOING, CARTOON - TROMBOING (Heard once in "All Dug Up".)
- Sound Ideas, BOINK, CARTOON - BOINK 01 (Heard once in the intro.)
- Sound Ideas, BOINK, CARTOON - TIMP DOINK (Heard once in "Land of the Giant" and "No Butts".)
- Sound Ideas, BOUNCE, CARTOON - TIMP BOUNCE, SLOW (Heard once in "Drainland Unplugged".)
- Sound Ideas, BUBBLES, MUD - THICK, GLOPPY MUD BUBBLES, BOIL (Heard once in "In the Soup".)
- Sound Ideas, BUBBLES, WATER - SMALL, STEADY, RAPID BUBBLES, HIGH INTENSITY, BOIL (Heard once in "Choo-Choo Drain".)
- Sound Ideas, CARTOON, ACCENT - BELL HEAD SHAKE, MUSIC, PERCUSSION 01 (Heard once in "In the Soup".)
- Sound Ideas, CARTOON, BOING - JEW'S HARP BOING, MEDIUM (Heard once in "No Butts".)
- Sound Ideas, CARTOON, BOING - JEW'S HARP BOING, SHORT 01 (Heard once in "No Butts".)
- Sound Ideas, CARTOON, BOING - JEW'S HARP BOING, SHORT 02 (Heard once in "Vanity Hair" and "In the Soup".)
- Sound Ideas, CARTOON, BOING - JEW'S HARP BOUNCES (Heard once in "All Dug Up".)
- Sound Ideas, CARTOON, BOING - SPACE BOING, HIGH (Heard twice in "Choo-Choo Drain".)
- Sound Ideas, CARTOON, BOING - STRING PLUCK (Heard twice in "Choo-Choo Drain" and once in "Glass Bowl of Love".)
- Sound Ideas, CARTOON, BOING - THIN METAL PING AND WARBLE 01 (Heard once in "Choo-Choo Drain".)
- Sound Ideas, CARTOON, SQUAWK - SMALL HORN BONK 01 (Heard once in the intro.)
- Sound Ideas, CARTOON, SQUEAK - SQUEAKY SCREW 03 (Heard once in a low pitch in "No Butts".)
- Sound Ideas, CARTOON, SQUISH - SHORT GURGLE AND SQUISH (Heard once in "In the Soup".)
- Sound Ideas, CARTOON, WARBLE - WARBLE SHEET (Heard once in "Choo-Choo Drain" and "All Dug Up".)
- Sound Ideas, CARTOON, WHISTLE - SLIDE WHISTLE: QUICK ZIP UP (Heard once in the intro.)
- Sound Ideas, CARTOON, WHISTLE - ZING WHISTLE, MEDIUM 01 (Heard once in reverse in "Land of the Giant".)
- Sound Ideas, CARTOON, WHISTLE - ZING WHISTLE, MEDIUM 04 (Heard once in a high pitch in "In the Soup".)
- Sound Ideas, CASH REGISTER - ANTIQUE: SINGLE KEY WITH BELL, SLOW (Heard once in "Choo-Choo Drain".)
- Sound Ideas, CHILDREN - CHEERING, CROWD 02 (Heard once in "Vanity Hair".)
- Sound Ideas, CLOCK, TICK - SMALL WIND UP CLOCK TICKING (Heard once in "In the Soup".)
- Sound Ideas, COMEDY, ACCENT - SLIDE WHISTLE DOWN (Heard once in "Once More, Unto the Drains!".)
- Sound Ideas, COMEDY, ACCENT - SLIDE WHISTLE FLOATING DOWN (Heard once in "Choo-Choo Drain".)
- Sound Ideas, COMEDY, ACCENT - SMALL JEWS HARP: HOPPING (Heard once in "Drainland Unplugged" and "Land of the Giant".)
- Sound Ideas, COMEDY, ACCENT - WARBLY SLIDE WHISTLE DOWN (Heard once in "All Dug Up" and "In the Soup".)
- Sound Ideas, COMEDY, ACCENT - WHOOP WHISTLE: SHORT (Heard once in "Once More, Unto the Drains!", "Land of the Giant" and "In the Soup".)
- Sound Ideas, COWBELL - RATTLE, SHORT, MUSIC, PERCUSSION (Heard once in "Vanity Hair".)
- Sound Ideas, CREAK, CHAIR - ROCKING CHAIR CREAKS (Heard once in "All Dug Up".)
- Sound Ideas, CROWD, OUTDOOR - CHILDREN: ELEMENTARY SCHOOL, PLAYING AT RECESS, AMBIENCE, PLAYGROUND 02 (Heard once in "Vanity Hair".)
- Sound Ideas, CROWD, PANIC - EXCITED, PANICKY CROWD (Heard in a Season 2 episode.)
- Sound Ideas, ELECTRICITY, SPARK - HIGH VOLTAGE SPARK, ELECTRICAL 02 (Heard once in the intro.)
- Sound Ideas, ELECTRICITY, SPARK - HIGH VOLTAGE SPARK, ELECTRICAL 11 (Heard once in "Choo-Choo Drain".)
- Sound Ideas, GONG - GONG, SOFT HIT, MUSIC, PERCUSSION (Heard once in "Choo-Choo Drain".)
- Sound Ideas, GUN, RICOCHET - RICOCHET: SINGLE SHOT, BULLET 01 (Heard once in "No Butts".)
- Sound Ideas, GUN, RICOCHET - RICOCHET: SINGLE SHOT, BULLET 02 (Heard once in "Vanity Hair".)
- Sound Ideas, GUN, RICOCHET - RICOCHET: SINGLE SHOT, BULLET 06 (Heard once in "Drainland Unplugged" and "Vanity Hair".)
- Sound Ideas, HIT, CARTOON - BIG HEAD BONK (Heard once in "All Dug Up" and "In the Soup".)
- Sound Ideas, HIT, CARTOON - HEAVY TIMP RISE (Heard once in "Land of the Giant", "Choo-Choo Drain" and "In the Soup".)
- Sound Ideas, HIT, CARTOON - HOLLOW HEAD KONK AND ZIP (Heard once in "Drainland Unplugged", "Vanity Hair" and "In the Soup".)
- Sound Ideas, HIT, CARTOON - HOLLOW METALLIC HEAD KONK AND HORN (Heard once in "Drainland Unplugged".)
- Sound Ideas, HIT, CARTOON - HOLLOW METALLIC HEAD KONK 01 (Heard once in "Drainland Unplugged".)
- Sound Ideas, HIT, CARTOON - HOLLOW METALLIC HEAD KONK 02 (Heard once in "Choo-Choo Drain".)
- Sound Ideas, HIT, CARTOON - KABONG (Heard once in "Drainland Unplugged" and "No Butts".)
- Sound Ideas, HIT, CARTOON - LID ON MANHOLE HIT (Heard once in "Choo-Choo Drain" and "In the Soup".)
- Sound Ideas, HOP, CARTOON - SINGLE JEWS HARP HOP 01 (Heard twice in "Choo-Choo Drain".)
- Sound Ideas, HORN, CARTOON - OLD BULB HORN (Heard once in "Land of the Giant".)
- Sound Ideas, KISS, CARTOON - BIG KISS, HUMAN 01 (Heard once in "Land of the Giant".)
- Sound Ideas, MOTOR, CARTOON - JETSONS LIP MOTOR (Heard once in "Glass Bowl of Love".)
- Sound Ideas, NOISEMAKER - HORN: TOOT, PARTY, TOY (Heard once in "Vanity Hair".)
- Sound Ideas, NOISEMAKER - PAPER BLOWOUT WITH HORN, PARTY (Heard once in "Vanity Hair".)
- Sound Ideas, PICK, CARTOON - FIDDLE PICK AND RISE, MEDIUM 02 (Heard thrice in "Once More, Unto the Drains!".)
- Sound Ideas, PLINK, CARTOON - SOUR PLINK (Heard quadrice in "Choo-Choo Drain" and "In the Soup" and once in "Once More, Unto the Drains!" and "Vanity Hair".)
- Sound Ideas, PLUCK, CARTOON - VAROOP (Heard once in "Drainland Unplugged".)
- Sound Ideas, POOF, CARTOON - WAHEEP AND POOF (Heard once in "Vanity Hair".)
- Sound Ideas, POP, CARTOON - HOYT'S POP (Heard once in "Land of the Giant".)
- Sound Ideas, POP, CARTOON - SQUISH POP (Heard once in "In the Soup".)
- Sound Ideas, RICOCHET - CARTOON RICCO 01 (Heard once in "Land of the Giant" and "No Butts".)
- Sound Ideas, ROCK, WATER - ROCK: SPLASH INTO WATER 01 (Heard once in "Once More, Unto the Drains!" and "In the Soup".)
- Sound Ideas, ROCK, WATER - ROCK: SPLASH INTO WATER 03 (Heard once in "Choo-Choo Drain" and "In the Soup".)
- Sound Ideas, RUN, CARTOON - FAST RUN, LONG/SHORT (Heard once in "Drainland Unplugged".)
- Sound Ideas, RUN, CARTOON - TEMPLE BLOCK GALLOP, LONG/SHORT (Heard once in "Drainland Unplugged" and "Vanity Hair".)
- Sound Ideas, RUN, CARTOON - TEMPLE BLOCK RIOT, LONG/MEDIUM/SHORT (Heard once in "No Butts".)
- Sound Ideas, SLURP, CARTOON - BIG DOUBLE SLURP, HUMAN (Heard once in "Drainland Unplugged".)
- Sound Ideas, SLURP, CARTOON - BIG SINGLE SLURP, HUMAN (Heard once in "Drainland Unplugged", "Vanity Hair" and "In the Soup".)
- Sound Ideas, SKID, CARTOON - BROKEN SKID (Heard once in "All Dug Up".)
- Sound Ideas, SKID, CARTOON - SHORT SKID (H-B) (Heard once in "Drainland Unplugged".)
- Sound Ideas, SLIDE, CARTOON - FIDDLE SLIDE UP 01 (Heard once in "Land of the Giant".)
- Sound Ideas, SLIDE, CARTOON - FIDDLE SLIDE UP 02 (Heard once in "Land of the Giant".)
- Sound Ideas, SLIDE, CARTOON - FIDDLE SLIDE UP, SHORT 01 (Heard once in "Vanity Hair".)
- Sound Ideas, SPIN, CARTOON - DAVE'S WIND WHISTLE SPIN (Heard once in "Drainland Unplugged".)
- Sound Ideas, SPIN, CARTOON - SPIN COMMOTION (Heard twice in "Vanity Hair".)
- Sound Ideas, SPIT, CARTOON - SINGLE SPLUT (Heard once in "Drainland Unplugged".)
- Sound Ideas, SPLAT, CARTOON - BORK PIE HIT (Heard once in "Choo-Choo Drain".)
- Sound Ideas, SPLAT, CARTOON - EARL'S PIE HIT (Heard once in "Drainland Unplugged".)
- Sound Ideas, SPLAT, CARTOON - PAINT FIGHT GLOP 05 (2nd splat; heard once in "Drainland Unplugged".)
- Sound Ideas, SPUTTER, CARTOON - SLOPPY SPUTTERING (Heard once in "Land of the Giant".)
- Sound Ideas, SQUEAK, CARTOON - LONG BALLOON SQUEAK (Heard once in "Land of the Giant".)
- Sound Ideas, SQUEAK, CARTOON - SHORT BALLOON SQUEAK (Heard once in "Land of the Giant".)
- Sound Ideas, SQUEAK, CARTOON - SHORT SCRAPING SQUEAK (Heard once in "Land of the Giant".)
- Sound Ideas, SQUEAK, METAL - TURNING (Heard once in "Land of the Giant".)
- Sound Ideas, SQUEAK, RUBBER - RUBBING (Heard once in "Drainland Unplugged", "Once More, Unto the Drains!" and "No Butts".)
- Sound Ideas, STRETCH, CARTOON - RUBBER BALLOON STRETCH (Heard once in "Land of the Giant".)
- Sound Ideas, STRETCH, CARTOON - RUBBER STRETCH, LONG (Heard once in "Land of the Giant".)
- Sound Ideas, SWISH, CARTOON - FAST TWIRLING SWISH, LONG (Heard once in "Choo-Choo Drain" and "In the Soup".)
- Sound Ideas, TAKE, CARTOON - WHISTLE TAKE (Heard once in "Land of the Giant".)
- Sound Ideas, THUMP, CARTOON - TUBE THUNK 01 (Heard once in "Drainland Unplugged".)
- Sound Ideas, TIP TOE, CARTOON - XYLOPHONE TIP TOE, LONG/MEDIUM/SHORT (Heard once in "A Ring Thing" and "Choo-Choo Drain".)
- Sound Ideas, TRAIN, STEAM - STEAM TRAIN: WHISTLES, CLOSE UP (Heard twice in "Choo-Choo Drain".)
- Sound Ideas, TWANG, CARTOON - HEAVY BOW TWANG (Heard once in "Once More, Unto the Drains!".)
- Sound Ideas, TWANG, CARTOON - SAW BLADE TWANG 01 (Heard once in "Choo-Choo Drain".)
- Sound Ideas, TWANG, CARTOON - SAW BLADE TWANG 02 (Heard once in "Land of the Giant".)
- Sound Ideas, TWANG, CARTOON - SAW BLADE TWANG 03 (Heard once in "Choo-Choo Drain".)
- Sound Ideas, WATER, LAKE - WATER LAPPING ON ROCK SHORE, LIGHT, WAVES (Heard once in "Vanity Hair" and "In the Soup".)
- Sound Ideas, WATER, SPLASH - MEDIUM SPLASH, CARTOON (Heard once in "Once More, Unto the Drains!".)
- Sound Ideas, WHISTLE, STEAM - FLINTSTONE FACTORY WHISTLE, SHORT, CARTOON (Heard once in "In the Soup".)
- Sound Ideas, ZIP, CARTOON - BIG WHISTLE ZING IN (Heard once in "Vanity Hair".)
- Sound Ideas, ZIP, CARTOON - BIG WHISTLE ZING OUT (Heard once in "Meet Dr. Drain" and "All Dug Up".)
- Sound Ideas, ZIP, CARTOON - LONG RICCO ZIP IN 03 (Heard once in "Land of the Giant".)
- Sound Ideas, ZIP, CARTOON - QUICK SLIDE WHISTLE ZIP UP (Heard once in "All Dug Up".)
- Sound Ideas, ZIP, CARTOON - QUICK WHISTLE ZIP IN (Heard twice in "All Dug Up" and once in "Land of the Giant", "In the Soup" and "No Butts".)
- Sound Ideas, ZIP, CARTOON - QUICK WHISTLE ZIP OUT (Heard once in "All Dug Up".)
- Sound Ideas, ZIP, CARTOON - QUICK WHISTLE ZIP OUT, HIGH (Heard once in "Drainland Unplugged", "Meet Dr. Drain", "All Dug Up", "In the Soup" and "No Butts".)
- Sound Ideas, ZIP, CARTOON - RIPPLE UP (Heard once in "Vanity Hair".)
- WB CARTOON, THUNK - SMALL THUNK (Heard once in the intro.)